What is Gangrene?
Gangrene happens when part of the body loses its blood supply and the tissue begins to die. In some cases, an infection can also develop and spread quickly through the damaged area. Gangrene most often affects the feet, toes, fingers, or hands, but it can occur anywhere in the body.
This condition is a medical emergency, especially when infection is involved. Early treatment can help prevent serious complications and protect healthy tissue.
Gangrene happens when blood flow is reduced or blocked. Conditions and injuries that increase the risk include:
- Diabetes
- Peripheral artery disease
- Severe infections
- Burns or traumatic injuries
- Frostbite
- Poor circulation
- Smoking
- Wounds that do not heal properly
Wet gangrene, which includes infection, can spread rapidly and requires immediate medical attention.
Symptoms
Gangrene can develop slowly or suddenly depending on the cause. Symptoms may vary, but common warning signs include:
- Skin that turns black, blue, gray, or dark purple
- Coldness or numbness in the affected area
- Severe pain or tenderness
- Swelling or redness
- Blisters or open sores
- Drainage or a strong odor from a wound
- Fever or feeling unwell
- Weakness or confusion in severe infections
How is it diagnosed?
A healthcare provider will examine the affected area and review your symptoms and medical history. Blood tests may be used to look for infection or inflammation.
Imaging tests such as X-rays, CT scans, MRI scans, or ultrasound can help determine how far the damage has spread and whether blood flow is affected. In some cases, tissue or fluid samples are tested to identify bacteria or confirm the diagnosis.
How is it treated?
Treatment for gangrene focuses on stopping the spread of tissue damage, treating infection, and restoring circulation whenever possible.
Early treatment may include:
- Antibiotics for infection
- Wound care
- Managing conditions such as diabetes or vascular disease
If tissue has already died, a procedure called debridement may be needed to remove the damaged area. Some people may need surgery to improve blood flow through blocked arteries.
Advanced cases may require amputation to prevent infection from spreading further. Certain patients may also benefit from hyperbaric oxygen therapy, which increases oxygen delivery to damaged tissue and may support healing.
Recovery depends on the severity of the condition and how quickly treatment begins. Prompt care often leads to better outcomes and may help preserve healthy tissue.
