Eschar: What Patients Need to Know

Eschar is a patch of dry, dark dead tissue that can form over a wound, burn, pressure injury, or infected skin lesion. It is not a diagnosis by itself, but a sign of underlying tissue damage that should be assessed so the cause can be treated and healing can be supported safely.

Overview: what eschar means

Eschar is dead tissue that forms a dry covering over damaged skin. It often appears black, brown, or dark tan, though color can vary. Many patients describe it as a hard scab, but medically it is different from an ordinary scab because it usually reflects deeper tissue injury or reduced blood supply rather than normal surface healing alone.

Eschar can develop after a burn, a pressure injury, trauma, surgery, a severe skin infection, or a wound that is not getting enough oxygen-rich blood. In some cases, it forms as part of the body’s response to injury. In others, it may signal that the wound bed is not healthy enough to heal well without medical care.

Whether eschar needs removal depends on the situation. Some stable, dry eschar can act like a temporary natural cover, especially if there is no sign of infection and blood supply is poor. In other situations, eschar traps bacteria, hides deeper damage, or delays healing, so clinicians may recommend wound cleaning, dressings, or debridement after proper assessment.

How eschar looks and feels

Eschar usually looks darker and drier than the surrounding skin. It may be black, brown, gray, or tan and can feel firm, thick, crusted, or leathery. The edges may be clearly defined, or they may blend into nearby injured tissue. Sometimes the skin around it is swollen, red, warm, or tender.

Patients may or may not feel pain. A wound can be painful because of inflammation or infection, but in some cases damaged nerves reduce sensation. This is one reason a wound should not be judged by pain alone. A painless area of eschar can still represent serious tissue damage that needs professional review.

It is also important to distinguish eschar from slough. Slough is usually soft, moist, and yellow, white, or gray, while eschar is typically drier and darker. Both can appear in chronic wounds and pressure injuries, and both can affect healing, but they are managed according to the full wound picture rather than color alone.

• Common appearance: dark, dry, thick tissue
• Common texture: hard, adherent, or leathery
• Possible surrounding signs: redness, swelling, warmth, drainage, odor
• Possible symptoms: pain, tenderness, delayed healing, or sometimes numbness

Common causes and risk factors

Eschar forms when skin and underlying tissue die after a significant injury or when blood flow is not enough to support healing. Burns are a well-known cause, particularly deeper burns. Pressure injuries can also develop eschar when prolonged pressure reduces blood supply to the skin, especially over the heels, hips, tailbone, or ankles. Reduced circulation from vascular disease may make this more likely.

Other causes include traumatic wounds, frostbite, severe inflammation, certain post-surgical wounds, and infections that injure the skin. Some insect or spider bites, though less common, can lead to tissue breakdown and a dark central crust. Eschar can also be seen with skin lesions caused by some infectious diseases, so the patient’s travel history, immune status, and overall health may matter.

Risk factors include diabetes, smoking, immobility, advanced age, malnutrition, poor circulation, nerve damage, and conditions that reduce immune function. People with chronic wounds may also have related issues such as diabetic foot ulcers or peripheral artery disease, both of which can increase the risk of tissue death and delayed healing.

How doctors diagnose and assess eschar

Diagnosis starts with a careful clinical examination. A doctor or wound specialist looks at the wound’s size, depth, color, drainage, odor, tenderness, and the condition of the surrounding skin. They also ask how the injury started, how long it has been present, and whether there are symptoms such as fever, spreading redness, or worsening pain.

Assessment focuses on more than the surface. Clinicians need to know whether the tissue underneath is healing, infected, or lacking blood supply. They may check pulses, skin temperature, sensation, and swelling. If circulation is a concern, vascular testing may be needed. If infection or deeper damage is suspected, blood tests, wound cultures in selected cases, or imaging may be considered.

The location matters. For example, dry, stable eschar on the heel without redness, drainage, or swelling is often approached differently from eschar on a burn or infected ulcer. Doctors also evaluate conditions that slow healing, such as diabetes, pressure, poor nutrition, and vein or artery problems. In more complex cases, wound care may involve dermatology, plastic surgery, infectious diseases, vascular medicine, or rehabilitation specialists.

Treatment options and wound care

There is no single eschar treatment that suits every patient. Care depends on the cause of the tissue damage, whether infection is present, the wound’s depth, blood supply, and the patient’s general health. The main goals are to protect healthy tissue, treat the underlying problem, reduce infection risk, and help the wound heal in the safest way possible.

In some cases, a clinician may recommend leaving stable, dry eschar in place temporarily, especially on an ischemic heel where blood flow is poor and there is no infection. In other situations, eschar may need debridement, which means removing dead tissue to expose healthier tissue underneath. Debridement can be done using different methods and should be planned by a qualified clinician. For burns or larger tissue injuries, advanced wound care and reconstructive surgery may be part of treatment.

Dressings are chosen based on moisture balance, drainage, and infection risk. Treatment may also include pressure relief, improved nutrition, blood sugar management, better circulation, antibiotics when infection is confirmed or strongly suspected, and pain control. If poor blood flow is preventing healing, evaluation by specialists may be needed, and some patients benefit from vascular surgery or a structured burn treatment plan depending on the cause.

Home care should be cautious. Patients should not cut, peel, or aggressively scrub eschar. Harsh antiseptics, unapproved ointments, and tight bandaging can slow healing or damage surrounding skin. A healthcare professional can explain how to clean the area, change dressings, reduce pressure, and monitor for warning signs.

Prevention and self-care

Preventing eschar starts with preventing the types of wounds that can lead to tissue death. Good skin care, early treatment of burns and injuries, pressure relief, and prompt attention to circulation problems all help. People who spend long periods in bed or a chair may need regular repositioning, supportive surfaces, and frequent skin checks, especially over bony areas and the heels.

For patients with diabetes or nerve damage, daily foot inspection is important. Even a small blister or callus can worsen if it goes unnoticed. Wearing well-fitting footwear, managing blood sugar, and reporting any wound that does not improve can reduce the risk of serious complications. Smoking cessation, balanced nutrition, and adequate hydration also support skin health and wound repair.

If a wound already has eschar, self-care should focus on protection rather than removal. Keep the area clean and dry or follow the moisture instructions given by the wound team, depending on the dressing plan. Avoid pressure, friction, and repeated trauma. Follow-up matters because a wound can change over time, even if it first appears stable.

When to seek medical care

Medical review is advisable whenever a new area of suspected eschar appears, especially after a burn, pressure injury, foot wound, or rapidly changing skin lesion. Early assessment can clarify the cause and reduce the chance of infection or delayed healing. Patients with diabetes, poor circulation, immune suppression, or limited mobility should seek care promptly because complications can develop more easily.

Urgent care is important if there is increasing redness, swelling, warmth, pus, a bad smell, fever, spreading discoloration, severe pain, numbness, or a wound that seems to deepen. Black tissue on the feet or toes can sometimes reflect serious circulation problems. Wounds after burns, trauma, or infection also deserve timely attention if they are not improving as expected.

For patients who need multidisciplinary evaluation, Acibadem International’s specialists in wound care, burns, vascular disease, and reconstructive treatment work in JCI-accredited hospitals to diagnose and treat complex wounds for international patients. The key step, however, is timely assessment by a qualified clinician rather than trying to manage suspicious tissue changes alone.

Frequently asked questions

Is eschar the same as a scab?

Not exactly. A scab is usually part of normal surface healing after minor skin injury, while eschar is dead tissue that often forms after deeper damage, poor blood flow, or severe inflammation. Because the causes and treatment can differ, a clinician should assess any dark, thick wound covering that is not healing normally.

Should eschar always be removed?

No. Some eschar should be removed, but some should be left in place for a time, depending on the wound, the blood supply, and whether infection is present. A wound specialist decides this after examining the area and the patient’s overall health.

Can eschar heal on its own?

Sometimes a small, stable area may remain dry and gradually separate as healing progresses, but this is not always safe or appropriate to wait for. Eschar can also hide deeper tissue damage or infection. Medical assessment helps determine whether observation, dressings, or active treatment is the safest option.

What color is eschar?

Eschar is often black or dark brown, but it can also appear tan, gray, or mixed in color. The exact appearance depends on the cause, depth of injury, and stage of tissue damage. Color alone does not show how serious the wound is.

Is eschar a sign of infection?

Not always. Eschar means tissue has died, but that can happen from burns, pressure, poor circulation, trauma, or infection. Infection may be present if there is redness, warmth, swelling, pus, odor, fever, or worsening pain, and these signs should be checked promptly.

Can eschar occur with diabetes?

Yes. People with diabetes are at higher risk because of reduced sensation, circulation problems, and slower healing. Any foot wound with dark tissue, drainage, or delayed healing in a person with diabetes should be evaluated quickly.

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.