What to Watch After a Kidney Biopsy: Urine Color, Blood Pressure Checks and Signs to Report

The first trip to the bathroom after a kidney biopsy has a particular kind of silence to it. You look down, you see a tint of pink or rust, and for a second the room narrows. Is that supposed to happen? Is this the bleeding after kidney biopsy the nurse mentioned, or the bleeding she told you to phone about?

Most people leave the recovery area with a sheet of instructions and a head too full of the day to absorb them. The sheet says rest, drink, watch your urine, check your blood pressure, call if something changes. What it rarely says is what “something” looks like at two in the morning when nobody is around to ask.

This explainer fills that gap. It walks through what the needle actually did, why the kidney bleeds more readily than many organs, how to read the color in the bowl, what the numbers on a home cuff can and cannot tell you, and the handful of signs that mean stop reading and pick up the phone.

What actually happens during a kidney biopsy

A kidney biopsy removes a sliver of kidney tissue so a pathologist, a doctor who examines tissue under a microscope, can see what the blood and urine tests could only hint at. The most common approach is percutaneous, meaning through the skin. You lie on your stomach or side, the skin over the lower back is numbed with a local anesthetic, and a radiologist or nephrologist (a kidney specialist) uses ultrasound or a CT scanner to watch the needle in real time.

The needle itself is spring loaded. When it fires, it takes a core of tissue roughly the width of a pencil lead and a little over a centimeter long. You will be asked to hold your breath for each pass, because the kidney moves with breathing. Two or three passes are typical, so the lab has enough tissue to study under several kinds of microscopy.

The whole procedure usually takes under an hour, though the preparation and recovery add several more. Afterward you lie flat while a nurse checks your pulse, blood pressure and urine at set intervals, according to Mayo Clinic and the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).

Two less common routes exist for people in whom a needle through the back is judged too risky. In a transjugular biopsy, a thin catheter is threaded from a neck vein down to the kidney, so any bleeding drains back into the bloodstream rather than around the organ. An open or laparoscopic biopsy is done in an operating room under general anesthesia, allowing the surgeon to see and control any bleeding directly. Your team chooses the route based on your clotting, your blood pressure, your anatomy and the reason the biopsy is needed.

Why bleeding after kidney biopsy is the complication teams watch most

The kidney is a filter, and filters are built around blood flow. A dense web of small arteries and veins runs through the tissue the needle must cross, so some bleeding is not so much a complication as a near certainty. The question is always how much and where it goes.

Bleeding can take three forms. The most visible is hematuria, blood in the urine, which happens when the needle track connects with the collecting system where urine forms. The second is a perirenal hematoma, a bruise-like pocket of blood that collects around the kidney inside its fibrous capsule; this may produce no change in urine color at all, only a growing ache in the flank. The third and rarest is an arteriovenous fistula, an abnormal channel between an artery and a vein created by the needle, which sometimes closes on its own and sometimes needs treatment.

Most bleeding, in any form, is self-limited and stops within a day or two, according to NIDDK and Mayo Clinic. A small minority of people bleed enough to need a blood transfusion, and a smaller number need a procedure called embolization, in which a radiologist threads a catheter into the bleeding artery and blocks it. Surgery to control bleeding is very rare.

The reason you lie flat for hours afterward is timing. The large majority of significant bleeds announce themselves in the first hours, when you are still being monitored. Delayed bleeding can happen after discharge, which is why the instruction sheet exists, but the observation period catches most of the trouble before you ever reach the parking lot. That is the core logic of post-biopsy care: watch hardest when the risk is highest, then teach you what to watch for once you are home.

How much bleeding is normal after a kidney biopsy? Blood in urine after kidney biopsy, explained

Pink, rose or rusty urine in the first 24 hours is expected, and many people see it. NIDDK notes that blood in the urine is common at first and typically clears within a day or two. Mayo Clinic describes the same pattern: some hematuria that fades on its own.

Here is the piece of perspective that calms most people: a very small volume of blood changes the color of a very large volume of urine. A few drops will tint an entire bladder’s worth pink. Bright, alarming color does not automatically mean a large amount of blood. What matters more is the trajectory, whether each visit to the bathroom is paler than the last or darker.

Tiny dark flecks or thread-like strands can pass in the first day as old blood clears. Those are different from clots the size of a pea or larger, and different again from feeling that you need to urinate but cannot, which can mean a clot is blocking the flow. Both of those belong on the phone-your-team list, not the wait-and-see list.

Around the puncture site, a bruise the size of a palm and some tenderness are ordinary. A dull, sore feeling in the back for a few days is ordinary too; the kidney sits deep and the muscles around it were held still for a long time. What is not ordinary is pain that escalates hour by hour, a feeling of pressure or fullness in the flank, or soreness spreading toward the abdomen or groin.

If you find yourself uncertain, the safest rule is simple: describe exactly what you see to the nurse line rather than deciding for yourself whether it counts. Teams would far rather field a call about pale pink urine than miss a bleed that started quietly.

Reading urine color after a kidney biopsy: a plain-language guide

Urine color is the single most useful home monitoring tool you have, and also the most misread. Foods such as beets and blackberries, some food dyes and several medicines can turn urine red or orange without any blood at all, as MedlinePlus notes. A single dark sample after a long sleep also concentrates whatever pigment is present. Look for the pattern across several visits, in daylight if possible, and against the white of the bowl rather than the water.

What you see	What it usually means	What to do
Pale straw to yellow	No visible blood; you are hydrated	Carry on with your instructions
Pink or light rose, fading with each visit	Small amount of blood clearing, expected in first 1–2 days	Note it, keep drinking as advised
Tea or cola brown	Older blood or concentrated urine; can also follow dehydration	Drink as advised; call if it darkens or persists beyond what your team described
Bright red, not fading or getting darker	Fresh, ongoing bleeding	Call your care team the same day
Red with clots larger than a pea	Active bleeding into the collecting system	Call immediately
Urge to urinate but little or nothing passes	Possible clot blocking flow	Seek urgent care

Two habits make this table work. First, glance every time rather than only when you feel worried; the first fully clear sample is reassuring information you will want to have. Second, if you own a smartphone, a photo taken under the same light each time gives your team something concrete to compare, which is far more useful than “it looked kind of red.”

Color is only one channel. Pair it with how you feel standing up, how your back feels, and what your blood pressure is doing. A bleed into the space around the kidney can leave the urine perfectly clear, so a normal bowl never cancels out a worsening flank ache or a lightheaded spell.

Who is usually offered a kidney biopsy, and who is asked to wait

Nobody has a kidney biopsy for curiosity. According to NIDDK, the common reasons are persistent protein or blood in the urine, a drop in kidney function that blood and imaging tests cannot explain, suspected inflammatory or autoimmune disease of the kidney such as lupus nephritis, and monitoring of a transplanted kidney when its function changes. In each case the tissue answers a question that no other test can: what exactly is happening inside the filtering units.

The decision to proceed is always balanced against bleeding risk, and several situations prompt a team to pause, prepare further or choose a different route. Uncontrolled high blood pressure is the most frequent reason for delay, because elevated pressure drives more blood through any vessel the needle nicks; teams generally want pressure brought into a safer range first. A known bleeding disorder, abnormal clotting tests or a low platelet count call for correction or a different approach. Medicines that thin the blood or make platelets less sticky are usually paused for a period set by the prescribing clinician, and the biopsy waits until that window has passed.

An active urinary tract infection is treated first, since a needle through infected tissue can spread bacteria. Having only one functioning kidney raises the stakes of any complication, so teams weigh the benefit more carefully and may prefer a transjugular or open approach. Pregnancy, uncooperative breathing because of severe lung disease, and certain anatomical findings on the pre-procedure scan can also change the plan.

None of these is an absolute barrier. They are reasons a careful team slows down. If you have been asked to wait, the honest framing is not that you have failed a test, but that your team has found something worth fixing before it puts a needle near a very well-supplied organ. That decision, and the timing of any rescheduling, rests with them.

Blood pressure checks after a kidney biopsy: what the numbers are telling you

Blood pressure does two jobs around a biopsy. Before the procedure it is a gatekeeper: pressure that is too high increases the chance of a significant bleed, which is why the pre-procedure reading matters so much. Afterward it becomes a witness. A change in either direction tells your team something about what is happening inside.

A fall in blood pressure, especially together with a faster pulse, lightheadedness on standing or clammy skin, is the body’s response to losing blood volume. It is one of the earliest measurable signs of internal bleeding and is precisely why nurses check you so often in the recovery area. A rise in blood pressure can reflect pain or anxiety, but a marked and sustained rise with flank pain can occasionally signal a hematoma pressing on the kidney, a rare pattern in which the compressed kidney releases hormones that push pressure up.

The American Heart Association defines normal blood pressure as below 120/80 mmHg and describes a reading above 180/120 mmHg as a hypertensive crisis requiring urgent attention. Your team may give you a narrower personal range to report; use theirs if you have it.

Home technique determines whether the numbers mean anything. The AHA advises sitting quietly for about five minutes first, back supported, feet flat, arm resting at heart level, no talking, cuff on bare skin. Take two readings a minute apart and write both down with the time. Avoid measuring right after climbing stairs, drinking coffee or using the bathroom.

One firm boundary: do not adjust any blood pressure medicine because of a reading, whether the number is higher or lower than you expected. Report it and let the prescribing clinician decide. A single odd reading is data, not a verdict, and the trend across the day is what your team will actually use.

The first 24 hours: what usually happens right after the procedure

Expect to spend several hours lying flat. Most centers keep you on your back, sometimes with a rolled towel pressing gently against the biopsy site, while a nurse checks your pulse and blood pressure frequently and asks you to urinate into a container so each sample can be compared with the last. Some teams draw a blood count before discharge to confirm your hemoglobin, the oxygen-carrying protein in red blood cells, has not dropped. NIDDK notes that some people stay overnight, particularly if bleeding risk is higher or the biopsy was done late in the day.

You will not be allowed to drive yourself home. Sedation, if used, dulls reaction time for the rest of the day, and the lying-flat period leaves many people stiff and a little unsteady. Arrange for someone to collect you and, ideally, to stay the first night.

Mayo Clinic advises resting for the first 12 to 24 hours. That means short walks to the bathroom and kitchen, not a trip to the shops. Drink fluids as your team directed; hydration keeps urine flowing, which helps small clots clear and makes color changes easier to read. Eat normally unless told otherwise.

Keep the dressing dry and in place for as long as you were instructed. A little oozing onto the gauze is expected. Sleeping on your back or the side opposite the biopsy tends to be most comfortable.

Write down, or ask your companion to write down, the time of each bathroom visit and the color you saw, along with any blood pressure readings. This log feels fussy in the moment and becomes invaluable if you need to phone the nurse line at midnight, because you can describe a trend rather than a feeling.

Kidney biopsy recovery time: what the following two weeks usually look like

The needle track heals quickly, but the kidney’s protective capsule and the small vessels within it need longer, and that is what sets the timeline. Both Mayo Clinic and NIDDK advise avoiding strenuous activity, heavy lifting, contact sports and vigorous exercise for about two weeks. The logic is mechanical: jolting or straining raises pressure inside the abdomen and can reopen a vessel that has only just sealed.

Within that boundary, life mostly resumes. Many people return to desk work after a couple of days, once the soreness eases and they trust their urine is clearing. Jobs that involve lifting, driving heavy vehicles or physical exertion need a longer conversation with your team. Gentle walking is encouraged from the first day; it lowers the risk of blood clots in the legs and helps you gauge how you feel upright.

Bruising at the site usually turns yellow-green and fades over a week or two. Soreness settles over several days. Your team will have told you which pain reliever is acceptable; some over-the-counter options are avoided after kidney procedures because they can affect both platelets and kidney function, so follow the specific instruction you were given rather than reaching for whatever is in the cabinet.

Results typically take around a week, sometimes longer when special stains or electron microscopy are needed, according to Mayo Clinic. A follow-up appointment is usually booked to discuss what the pathologist found and what, if anything, changes in your care.

Delayed bleeding is uncommon but possible during this window, most often in the first few days. The signs are the same ones you learned to watch for on day one: darkening urine, clots, escalating flank pain, dizziness. Keep the nurse line number where you can find it until your follow-up visit has happened.

What are the signs of internal bleeding around the kidney?

Internal bleeding around the kidney is quieter than bleeding into the urine, because the blood has nowhere obvious to go. It pools in the space between the kidney and the surrounding fat, stretching tissue as it accumulates. That stretching is what you feel.

The earliest sign is usually pain in the flank, the area between the lower ribs and the hip on the biopsied side, that builds rather than eases. Ordinary post-procedure soreness plateaus and then improves; a hematoma tends to feel deeper, fuller and progressively worse over hours. Some people describe a sensation of pressure or of the side feeling swollen or tight. Pain may spread toward the abdomen or the groin as the collection grows. Pressing gently on the area may be markedly tender.

As blood volume falls, the whole body reports it. Lightheadedness on standing, a pulse you can feel racing at rest, pale or grayish skin, cool clammy hands, nausea, unusual thirst and a sense of being short of breath all point the same direction. A drop in blood pressure on your home cuff, especially alongside a fast heart rate, is an objective version of the same message. Confusion or fainting are late signs and mean emergency care, not a phone call.

A low-grade temperature can appear a day or two later as the body begins to break down a collection of blood, though fever should always be reported because infection is the other explanation.

Your team will usually confirm or rule out a hematoma with an ultrasound or CT scan. Many small collections need nothing but observation and time. Larger or expanding ones may need a transfusion or an embolization procedure to seal the bleeding vessel. Which path applies is a judgment for the treating team, made on the scan and on how you look, not on any single number.

What are two ways to tell if bleeding is life threatening?

First-aid teaching, including the guidance MedlinePlus gives on bleeding, rests on two questions. How much and how fast is the blood being lost? And how is the body coping with the loss? After a kidney biopsy you can rarely answer the first question directly, because most of the bleeding is hidden. That makes the second question the one that matters most at home.

The first way, then, is the pace of what you can see. Urine that grows darker with each visit rather than paler, clots that are larger and more frequent, or a dressing that is repeatedly soaked rather than lightly stained all describe bleeding that is not slowing down. Bleeding that stops on its own trends in one direction; bleeding that needs help trends in the other.

The second way is the body’s response, which is the same regardless of where the blood is going. MedlinePlus lists the signs of shock from blood loss: pale, cool, clammy skin; a rapid, weak pulse; rapid breathing; dizziness or fainting; confusion or unusual drowsiness; intense thirst. Any of these after a kidney biopsy, particularly with flank pain, means the situation has moved beyond a routine call. Phone emergency services or have someone take you to an emergency department without delay.

A useful home marker sits between the two: how you feel when you stand up. If getting to your feet brings a wave of dizziness, a pounding heart or a gray-out of vision, your circulation is already compensating for lost volume. That is an early warning, not a late one, and it deserves a same-hour response.

The honest summary is that most people never need either test. The overwhelming majority of bleeding after a kidney biopsy is small, visible, and fading by the second day. Knowing what a dangerous pattern looks like is not about expecting it. It is about never having to guess.

Medicines that affect bleeding risk after a kidney biopsy

Three groups of medicines shape bleeding risk around a biopsy, and understanding what each one does makes the instructions you were given feel less arbitrary.

Anticoagulants slow the chain of reactions that turns liquid blood into a clot. Antiplatelet agents make platelets, the tiny cell fragments that plug a hole in a vessel wall, less sticky. Both are commonly paused for a set period before a biopsy and restarted afterward, but the timing of each step depends on why you take the medicine in the first place. Someone with a mechanical heart valve or a recent clot carries a very different risk from pausing than someone taking a low-dose agent for general prevention. That balance is struck by the prescribing clinician, and it is not one to renegotiate on your own because you feel well or because your urine looks clear.

Nonsteroidal anti-inflammatory drugs, the class that includes several common over-the-counter pain relievers, also reduce platelet stickiness and can strain kidney function, which is why many teams ask people to avoid them for a period around the procedure. If you were told to use a different type of pain reliever, that instruction is specific to you; ask before substituting.

Some dietary supplements, including fish oil and certain herbal products, may have mild effects on clotting. The National Institutes of Health Office of Dietary Supplements advises telling your care team about every supplement you take, precisely so nothing is overlooked.

Two practical rules follow. Bring a complete list of everything you take, prescription and otherwise, to the pre-biopsy visit. And after the procedure, if you are unsure whether a particular medicine is safe to resume, treat that uncertainty as a reason to call, not a reason to decide. Restarting a blood thinner a day early, or stopping one a day late, is exactly the kind of decision that belongs with the person who prescribed it.

What people often get wrong about bleeding after kidney biopsy

“Any pink means something has gone wrong.” The opposite is closer to the truth. Light pink urine fading over a day or two is the expected course, described by both Mayo Clinic and NIDDK. Alarm belongs to darkening color, clots and symptoms elsewhere in the body, not to the mere presence of a tint.

“If my urine was clear at discharge, I am in the clear.” Bleeding around the kidney can leave the urine untouched. Clear urine is good news about one type of bleeding, not a guarantee against the other. Flank pain and dizziness matter regardless of what is in the bowl.

“I need to stay in bed for a week.” Prolonged bed rest raises the risk of leg clots and does nothing for the kidney. The guidance is rest for the first day, then gentle activity, with strenuous effort held off for about two weeks. Walking is part of recovery, not a threat to it.

“Drinking gallons of water will flush the bleeding out.” Sensible hydration helps clots clear and keeps urine easy to read. Forcing large volumes does not stop a vessel from bleeding and can be uncomfortable or, for people with reduced kidney function, unwise. Follow the fluid guidance your team gave you.

“Back pain always means a bleed.” Muscular soreness from lying still for hours is common and eases with time. The distinguishing features of a hematoma are pain that steadily worsens, a sense of fullness, and accompanying whole-body signs.

“The biopsy will damage my kidney.” The tissue removed is a tiny fraction of an organ containing roughly a million filtering units. The information gained usually outweighs the small risk, which is why the biopsy was offered.

“I can restart my blood thinner once I feel fine.” Feeling fine says nothing about whether a needle track has sealed. That timing is the prescriber’s call.

Questions to ask your care team before and after the biopsy

The most useful conversations happen before the procedure, when nobody is sedated and there is time to write things down. Bring a companion if you can; two sets of ears catch more. These questions are a starting point, not a script.

• Which approach will you use for my biopsy, and why is it the right one for me?
• Which of my medicines and supplements should I pause, when exactly should each stop, and who will tell me when to restart?
• What blood pressure range are you aiming for before the procedure, and what readings should I report afterward?
• How long should I expect to stay in the recovery area, and is an overnight stay likely in my case?
• What urine color and what amount of clot would you consider normal for me, and what would you want to hear about the same day?
• Which pain reliever may I use at home, and which should I avoid?
• Is there anything about my situation, such as having one kidney, a transplant or a clotting history, that changes what I should watch for?
• When can I return to work, drive, lift my child, or exercise?
• Whom do I call at night or on a weekend, and what number do I use?
• When will the results be ready, and how will I receive them?

After the procedure, before you leave, confirm three things in plain words: what you should look for, whom you should call, and when you are next expected back. Ask the nurse to show you the biopsy site and describe what the dressing should look like tomorrow. If any instruction on the printed sheet contradicts something you were told verbally, ask which one applies. A five-minute clarification at the bedside spares a great deal of uncertainty later.

When to call your doctor after a kidney biopsy

The overwhelming majority of people recover without incident, and this section exists so that the few who need help recognize it early. Keep the after-hours number your team gave you somewhere visible until your follow-up visit.

Call emergency services or go to an emergency department now if you have:

• Fainting, near-fainting, confusion or unusual drowsiness
• Pale, cold, clammy skin with a rapid or weak pulse, or a sharp drop in blood pressure on your home cuff
• Chest pain or difficulty breathing
• Severe, rapidly worsening flank or abdominal pain
• Inability to pass urine despite a strong urge, suggesting a clot is blocking the flow

Call your care team the same day, without waiting for morning, if you have:

• Urine that is bright red, darkening with each visit, or has not begun to clear by the time your team said it should
• Clots larger than a pea, or clots that are becoming more frequent
• Flank pain or pressure that is building rather than easing, or spreading toward the groin
• Lightheadedness or a racing heart when you stand
• A blood pressure reading above 180/120 mmHg, the American Heart Association’s crisis threshold, or any reading outside the range your team specified
• Fever, chills, or redness, warmth, swelling or pus at the biopsy site
• Bleeding from the site that soaks through a dressing

Mention at your follow-up, or call during office hours, if you notice: persistent mild soreness beyond a week, a bruise that keeps enlarging after the first few days, or questions about restarting any paused medicine.

When you call, have your log ready: the time and color of recent urine, your blood pressure readings, your pulse if you can feel it, and how you feel standing up. Those details let the clinician on the line judge urgency accurately. Every decision about scans, admission or treatment then sits with your treating team, who know your history and can see you.

Frequently asked questions

How much bleeding is normal after a biopsy of the kidney?

Pink or rust-tinted urine that fades over the first day or two is the expected pattern, described by both Mayo Clinic and NIDDK. Tiny flecks or strands may pass as old blood clears. Bruising and mild soreness at the puncture site are also normal. Clots larger than a pea, urine that darkens rather than clears, or an inability to urinate are outside the normal range and should be reported to your care team promptly.

Is blood in urine after kidney biopsy always a bad sign?

No. Blood in the urine is common immediately after a kidney biopsy because the needle passes through tissue rich in small vessels and may touch the collecting system. In most people it clears within a day or two without treatment. It becomes a concern when the color intensifies over time, when clots appear, or when it is accompanied by flank pain, dizziness or a fast pulse, all of which suggest bleeding that is not settling.

What are the signs and symptoms of internal bleeding in the kidneys?

Internal bleeding around the kidney usually shows up as flank pain that builds steadily rather than easing, often with a feeling of fullness or pressure on the biopsied side. As blood volume falls, the body responds with lightheadedness on standing, a rapid pulse, pale clammy skin, nausea and thirst. The urine may stay clear. Fainting or confusion are late signs and call for emergency care rather than a phone call.

What are the first signs of internal bleeding after a procedure?

The earliest signs are often subtle: feeling dizzy or seeing gray when you stand, a heart rate that stays fast at rest, unusual thirst and a deep ache at the procedure site that keeps worsening. A blood pressure reading lower than your usual, paired with a faster pulse, is an objective early marker. Any of these after a kidney biopsy warrants a same-hour call to your care team so they can assess you.

What are two ways to tell if bleeding is life threatening?

First-aid guidance, including MedlinePlus, uses two tests: the pace of visible blood loss, and how the body is coping. After a kidney biopsy the first shows as urine darkening with each visit or clots becoming larger and more frequent. The second is the appearance of shock: pale cold clammy skin, rapid weak pulse, fast breathing, confusion or fainting. Either pattern means emergency care now, not a wait until morning.

What are the most common kidney biopsy complications?

Bleeding is the most common complication, according to NIDDK, most often as temporary blood in the urine that stops on its own. A bruise-like collection of blood around the kidney can also form and usually resolves with observation. Less common problems include infection at the puncture site, an abnormal connection between an artery and a vein created by the needle, and, rarely, bleeding significant enough to need a transfusion or a procedure to seal the vessel.

How long is kidney biopsy recovery time?

Mayo Clinic advises resting for the first 12 to 24 hours and avoiding strenuous activity, heavy lifting and contact sports for about two weeks, and NIDDK gives similar guidance. Many people return to desk work within a few days once soreness eases and urine has cleared. Bruising fades over one to two weeks. Results typically take around a week. Your team will tailor these ranges to your situation, particularly if you have a single kidney or a transplant.

What does kidney biopsy aftercare involve at home?

Aftercare centers on watching and recording. Note the color of your urine at each bathroom visit, check your blood pressure as instructed using proper technique, keep the dressing dry, and log any pain or dizziness. Drink fluids as directed, walk gently, and avoid lifting and straining for about two weeks. Take only the pain reliever your team approved, and do not restart any paused blood-thinning medicine until the prescribing clinician tells you to.

Why does my blood pressure matter so much after a kidney biopsy?

Blood pressure works as an early warning system. A fall, especially with a rising pulse, can signal that blood volume is dropping from internal bleeding before other symptoms appear. A marked, sustained rise can reflect pain or, rarely, a collection of blood pressing on the kidney. The American Heart Association classifies a reading above 180/120 mmHg as a hypertensive crisis. Report readings outside the range your team specified rather than adjusting any medicine yourself.

Can I take my usual pain reliever after a kidney biopsy?

Ask before you do. Nonsteroidal anti-inflammatory drugs, a class that includes several common over-the-counter pain relievers, reduce platelet stickiness and can affect kidney function, so many teams ask people to avoid them around the procedure. Your discharge instructions should name what is acceptable for you. If they do not, or if you are unsure which category a product falls into, call your care team rather than guessing. Mild soreness usually eases within a few days.

References

• NIH NIDDK: Kidney Biopsy
• MedlinePlus Medical Encyclopedia: Renal biopsy
• MedlinePlus Medical Encyclopedia: Bleeding
• MedlinePlus Medical Encyclopedia: Urine – bloody

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.