Endometrial Polyps

What is endometrial polyps?

Endometrial polyps are growths that develop in the lining of the uterus (the womb). The lining of the uterus is called the endometrium, and it is the tissue that thickens and sheds each month during a menstrual period. When an area of this lining grows more than it should, it can form a small, soft lump of tissue that projects into the cavity of the uterus. Doctors call this growth an endometrial polyp, also known as a uterine polyp. In the international classification of diseases, the condition is coded as ICD-10 N84.0.

People often ask, what is endometrial polyps in simple terms? A helpful way to picture a polyp is as a small mushroom or teardrop of tissue attached to the wall of the uterus. Some polyps sit flat against the wall on a broad base, while others hang from a thin stalk. They can range from a few millimeters, about the size of a sesame seed, to several centimeters, roughly the size of a golf ball. A person may have a single polyp or several at the same time.

Endometrial polyps are common. They occur most often in people who are in their 40s and 50s, particularly around the time of menopause (the natural end of menstrual periods) and after menopause. However, they can also develop in younger people of reproductive age. The vast majority of endometrial polyps are benign, meaning they are not cancer. A small proportion may contain precancerous or cancerous cells, and the chance of this is somewhat higher after menopause, which is why doctors take polyps found in postmenopausal patients seriously and often recommend removing them for examination.

Symptoms of endometrial polyps

Endometrial polyps symptoms vary widely. Some people have no symptoms at all, and the polyp is discovered by chance during an ultrasound or other test done for a different reason. When symptoms do occur, abnormal uterine bleeding is by far the most common complaint.

Common endometrial polyps symptoms include:

• Irregular menstrual bleeding — periods that are unpredictable in timing or that vary in heaviness from month to month.
• Bleeding between periods — spotting or light bleeding at times of the cycle when bleeding is not expected.
• Heavy menstrual periods — periods that are heavier or longer than what is usual for you.
• Bleeding after menopause — any vaginal bleeding, even light spotting, that occurs after periods have stopped.
• Bleeding after sexual intercourse — in some cases, a polyp can bleed when it is touched or disturbed.
• Difficulty becoming pregnant — in some people, polyps may interfere with fertility, although the relationship is not fully understood.

Symptoms can differ depending on a person’s stage of life. Before menopause, polyps most often show up as changes in the menstrual pattern, such as spotting between periods or heavier flow. After menopause, when regular periods have ended, the typical warning sign is any new vaginal bleeding at all. Postmenopausal bleeding should never be ignored, because although it is often caused by a benign problem such as a polyp, it can occasionally be a sign of endometrial cancer, and a doctor needs to rule that out.

The size of a polyp does not always predict symptoms. Small polyps can cause noticeable bleeding, while some larger ones cause none. Pain is not a typical feature of endometrial polyps; if significant pelvic pain is present, other conditions usually need to be considered as well.

Causes and risk factors

The exact endometrial polyps causes are not fully understood. What is well established is that polyps are sensitive to hormones, particularly estrogen. Estrogen is the hormone that stimulates the endometrium to grow during each menstrual cycle. Polyps appear to arise when an area of the lining responds too strongly to this hormonal stimulation and keeps growing instead of shedding normally.

Several factors are known to increase the likelihood of developing endometrial polyps:

• Age — polyps become more common with increasing age, especially during the years around menopause (perimenopause) and after it.
• Obesity — fatty tissue produces estrogen, so carrying excess body weight can raise estrogen levels and encourage endometrial growth.
• High blood pressure (hypertension) — this has been associated with a higher likelihood of polyps in many studies, although the reason is not entirely clear.
• Tamoxifen use — tamoxifen is a medication used in the treatment of breast cancer. Although it blocks estrogen in breast tissue, it can act like estrogen on the uterine lining and is a well-recognized risk factor for polyps.
• Hormone therapy — some forms of hormone treatment after menopause, particularly regimens containing estrogen, may increase risk.
• Certain inherited conditions — rare genetic syndromes, such as Lynch syndrome, are linked to a higher risk of endometrial abnormalities in general; people with such conditions are usually monitored more closely by their doctors.

It is important to understand that having one or more risk factors does not mean a person will definitely develop polyps, and many people who develop them have no identifiable risk factor at all. Endometrial polyps are not caused by anything a person did or failed to do, and they are not an infection, so they cannot be passed to anyone else.

Diagnosis

Endometrial polyps diagnosis usually begins when a person sees a doctor because of abnormal bleeding, or when a polyp is suspected on a routine scan. Doctors use a combination of the medical history, a physical examination, and imaging or procedural tests to confirm the diagnosis.

Transvaginal ultrasound

A transvaginal ultrasound is often the first test. A slim ultrasound probe is placed in the vagina, which allows a clear view of the uterus and its lining. A polyp may appear as a thickened area of the lining or as a distinct growth. Ultrasound is painless apart from mild pressure and takes only a short time. However, it cannot always distinguish a polyp from other causes of a thickened lining, so further tests are often needed.

Saline infusion sonohysterography

In this test, sometimes called a saline ultrasound, a small amount of sterile salt water is gently introduced into the uterus through a thin tube before the ultrasound. The fluid expands the uterine cavity slightly, outlining any polyps and making them much easier to see. This improves the accuracy of the ultrasound considerably.

Hysteroscopy

Hysteroscopy is considered the most reliable way to confirm endometrial polyps. A hysteroscope is a very thin telescope with a camera, which the doctor passes through the cervix (the neck of the womb) into the uterus. This allows the doctor to see the inside of the uterus directly, identify any polyps, and in many cases remove them during the same procedure. Hysteroscopy can often be done in an outpatient setting, sometimes with local anesthesia, and sometimes under sedation or general anesthesia depending on the situation.

Endometrial biopsy and tissue examination

A biopsy means taking a small sample of tissue for examination under a microscope. A definitive diagnosis of an endometrial polyp — and, crucially, confirmation that it is benign — can only be made by a pathologist (a doctor who examines tissue) after the polyp or a sample of it has been removed. For this reason, when polyps are removed, they are routinely sent to a laboratory for analysis. This step is especially important in postmenopausal patients or in anyone with risk factors for endometrial cancer.

Treatment options for endometrial polyps

Endometrial polyps treatment depends on several factors: whether the polyp is causing symptoms, the person’s age and menopausal status, the size of the polyp, plans for future pregnancy, and the individual’s risk of endometrial cancer. Care is typically provided by a gynecologist, a doctor who specializes in conditions of the female reproductive system. Within hospital settings such as Acibadem, this condition is managed by the Gynecology & Obstetrics department.

Watchful waiting

Not every polyp needs immediate treatment. Small polyps that cause no symptoms, particularly in younger, premenopausal people at low risk of cancer, may sometimes be monitored rather than removed. Some small polyps resolve on their own over time. If your doctor recommends watchful waiting, this usually involves follow-up appointments and possibly repeat ultrasound scans to check whether the polyp has grown or begun to cause symptoms.

Medication

Hormonal medications, such as progestins (synthetic forms of the hormone progesterone) or certain other hormone-modulating drugs, may temporarily reduce bleeding symptoms associated with polyps. However, medication does not usually make an established polyp disappear permanently, and symptoms often return once the medication is stopped. For this reason, medication is generally viewed as a short-term or supportive measure rather than a definitive treatment.

Hysteroscopic polypectomy

The standard treatment for symptomatic polyps is hysteroscopic polypectomy — removal of the polyp using a hysteroscope. The doctor passes small instruments through the hysteroscope to cut or shave away the polyp under direct vision, without any incision on the abdomen. This approach allows precise removal while preserving the healthy uterine lining, which matters for people who wish to become pregnant. The removed tissue is sent for laboratory examination. Recovery is usually quick: many people return to normal activities within a day or two, though mild cramping and light bleeding for a few days are common. Your doctor will give you specific guidance based on your situation.

Surgery in selected cases

In uncommon situations — for example, when a polyp is found to contain precancerous or cancerous cells, when polyps repeatedly come back and cause severe symptoms, or when other uterine conditions are present at the same time — a doctor may discuss more extensive surgery, such as hysterectomy (removal of the uterus). This is a major operation that ends the ability to carry a pregnancy, so it is reserved for specific circumstances and is always a shared decision between the patient and the medical team.

Polyps can sometimes recur after removal, so follow-up may be recommended, especially for people with ongoing risk factors such as tamoxifen use.

Living with endometrial polyps and outlook

For most people, the outlook with endometrial polyps is good. The large majority of polyps are benign, and removal by hysteroscopy is generally a safe, minimally invasive procedure that relieves bleeding symptoms in many cases. After removal, most people are able to resume their usual routines quickly.

That said, a few honest points are worth keeping in mind. Polyps can come back after treatment, particularly in people who continue to have risk factors such as obesity, tamoxifen therapy, or hormonal imbalance. Removing a polyp does not guarantee that abnormal bleeding will never occur again, because bleeding can also have other causes. And while the risk of a polyp containing cancer is small, it is not zero — which is why laboratory examination of removed tissue and appropriate follow-up matter.

For people trying to conceive, removing polyps may improve the chances of pregnancy in some cases, particularly when a polyp is thought to be interfering with the implantation of an embryo. However, fertility depends on many factors, and polyp removal alone cannot guarantee a successful pregnancy. If fertility is a concern for you, it is worth discussing the timing and approach of any treatment with your gynecologist.

In day-to-day life, there are no specific dietary restrictions or activity limits associated with having polyps. Maintaining a healthy weight may help, since excess body fat raises estrogen levels, but lifestyle changes alone cannot be relied upon to shrink or prevent polyps. The most useful habit is simply paying attention to your bleeding pattern and reporting changes to your doctor.

Frequently asked questions

What is endometrial polyps in simple terms?

An endometrial polyp is a soft growth of tissue that forms in the lining of the uterus and bulges into the uterine cavity. It develops when part of the lining grows more than it should, often under the influence of the hormone estrogen. Polyps can be tiny or several centimeters across, and a person may have one or more. Most are benign, meaning they are not cancer.

Can endometrial polyps go away on their own?

Some small polyps, particularly in premenopausal people, may shrink or disappear without treatment. This is one reason doctors sometimes recommend watchful waiting for small polyps that cause no symptoms. Larger polyps and those that cause bleeding are less likely to resolve by themselves, and polyps found after menopause are usually removed so the tissue can be examined. Your doctor can advise which approach is appropriate in your case.

How serious are endometrial polyps?

In most cases, endometrial polyps are not serious. The majority are benign and cause either no symptoms or bothersome but manageable bleeding. A small proportion contain precancerous or cancerous cells, and this risk is somewhat higher in postmenopausal people and in those with bleeding symptoms. Because of this, doctors take a cautious approach: they investigate abnormal bleeding thoroughly and usually send removed polyps for laboratory analysis rather than assuming they are harmless.

Do endometrial polyps affect fertility?

They can in some cases. A polyp inside the uterine cavity may interfere with the implantation of an embryo or, less commonly, block the area where the fallopian tube enters the uterus. For people experiencing difficulty conceiving, doctors often recommend removing polyps, and in some cases this may improve the chances of pregnancy. However, fertility involves many factors, and removing a polyp does not guarantee conception.

What does endometrial polyps treatment involve and how long is recovery?

The most common treatment is hysteroscopic polypectomy, in which the polyp is removed through the vagina and cervix using a thin camera and small instruments, with no cuts on the abdomen. The procedure is usually short and may be done with local anesthesia, sedation, or general anesthesia. Most people go home the same day and return to normal activities within a day or two, though mild cramping and light spotting for a few days are common. Your doctor will tell you when it is safe to resume exercise and sexual activity.

Can endometrial polyps come back after removal?

Yes, polyps can recur after removal, although many people never develop another one. Recurrence appears more likely in people with ongoing risk factors, such as tamoxifen use or hormonal imbalance. If bleeding symptoms return after treatment, it is important to see your doctor again so the cause can be checked, since it may be a new polyp or a different condition altogether.

Are endometrial polyps the same as fibroids?

No. Although both are usually benign growths related to the uterus, they are different conditions. Polyps grow from the soft lining of the uterus (the endometrium), while fibroids are firm growths that develop from the muscle wall of the uterus. They can cause similar symptoms, such as heavy bleeding, and can occur at the same time, which is one reason imaging tests and sometimes hysteroscopy are needed to tell them apart.

When to see a doctor

Abnormal uterine bleeding always deserves medical attention, even when the cause turns out to be benign. You should make an appointment with a doctor if you notice any of the following:

• Any vaginal bleeding after menopause — even a single episode of light spotting. This is the most important red flag and should always be evaluated promptly.
• Bleeding or spotting between periods that occurs repeatedly or without an obvious explanation.
• Periods that have become much heavier or longer than what is normal for you.
• Bleeding after sexual intercourse on more than one occasion.
• Very heavy bleeding — for example, soaking through pads or tampons every hour for several hours, passing large clots, or feeling dizzy, weak, or faint from blood loss. This may need urgent care.
• Difficulty becoming pregnant alongside irregular bleeding, which may prompt an evaluation of the uterine cavity.

Seeing a doctor early does not mean something serious is wrong — in many cases the cause is a benign condition such as an endometrial polyp, and effective treatment is available. But because the same symptoms can occasionally signal a more serious problem, a timely evaluation by a gynecologist is the safest course. If you experience sudden, severe bleeding with dizziness or fainting, seek emergency medical care rather than waiting for a routine appointment.