Ulcers are wounds or open sores that will not heal or keep returning. Ulcers may or may not be painful. The patient generally has a swollen leg and may feel burning or itching. There may also be a rash, redness, brown discoloration or dry, scaly skin. The three most common types of leg and foot ulcers include:
- Venous stasis ulcers
- Arterial (ischemic ulcers)
- Neurotrophic (diabetic)
Ulcers are typically defined by the appearance of the ulcer, the ulcer location, and the way the borders and surrounding skin of the ulcer look.
Venous ulcers are located below the knee and are primarily found on the inner part of the leg, just above the ankle.
The base of a venous ulcer is usually red. It may also be covered with yellow fibrous tissue or there may be a green or yellow discharge if the ulcer is infected. Fluid drainage can be significant with this type of ulcer. The borders of a venous ulcer are usually irregularly shaped and the surrounding skin is often discolored and swollen. It may even feel warm or hot. The skin may appear shiny and tight, depending on the amount of edema (swelling).
Venous stasis ulcers are common in patients who have a history of leg swelling, varicose veins, or a history of blood clots in either the superficial or the deep veins of the legs. Ulcers may affect one or both legs.
Venous ulcers affect 500,000 to 600,000 people in the United States every year and account for 80 to 90% of all leg ulcers.
Arterial ulcers are usually located on the feet and often occur on the heels, tips of toes, between the toes where the toes rub against one another or anywhere the bones may protrude and rub against bed sheets, socks or shoes. Arterial ulcers also occur commonly in the nail bed if the toenail cuts into the skin or if the patient has had recent aggressive toe nail trimming or an ingrown toenail removed.
The base of an arterial or ischemic ulcer usually does not bleed. It has a yellow, brown, grey, or black color. The borders and surrounding skin usually appear as though they have been punched out. If irritation or infection are present, there may or may not be swelling and redness around the ulcer base. There may also be redness on the entire foot when the leg is dangled; this redness often turns to a pale white/yellow color when the leg is elevated.
Arterial ulcers are typically very painful, especially at night. The patient may instinctively dangle his/her foot over the side of the bed to get pain relief. The patient usually has prior knowledge of poor circulation in the legs and may have an accompanying disorder, such as those listed below.
Neurotrophic ulcers are usually located at increased pressure points on the bottom of the feet. However, neurotrophic ulcers related to trauma can occur anywhere on the foot. They occur primarily in people with diabetes, although they can affect anyone who has an impaired sensation of the feet.
The base of the ulcer is variable, depending on the patient’s circulation. It may appear pink/red or brown/black. The borders of the ulcer are punched out, while the surrounding skin is often calloused.
Neuropathy and peripheral artery disease often occur together in people who have diabetes. Nerve damage (neuropathy) in the feet can result in a loss of foot sensation and changes in the sweat-producing glands, increasing the risk of being unaware of foot calluses or cracks, injury or risk of infection. Symptoms of neuropathy include tingling, numbness, burning or pain.
It is easy to understand why people with diabetes are more prone to foot ulcers than other patients. This is why people with diabetes need to inspect their feet and their shoes daily and wear appropriate footwear. People with diabetes should never walk barefoot.
- Poor circulation, often caused by arteriosclerosis
- Venous insufficiency (a failure of the valves in the veins of the leg that causes congestion and slowing of blood circulation in the veins)
- Other disorders of clotting and circulation that may or may not be related to atherosclerosis
- Renal (kidney) failure
- Hypertension (treated or untreated)
- Lymphedema (a buildup of fluid that causes swelling in the legs or feet)
- Inflammatory diseases including vasculitis, lupus, scleroderma or other rheumatological conditions
- Other medical conditions such as high cholesterol, heart disease, high blood pressure, sickle cell anemia, bowel disorders
- History of smoking (either current or past)
- Pressure caused by lying in one position for too long
- Genetics (ulcers may be hereditary)
- A malignancy (tumor or cancerous mass)
- Certain medications
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The goals of treatment are to relieve pain, speed recovery and heal the wound. Each patient’s treatment plan is individualized, based on the patient’s health, medical condition and ability to care for the wound.
Treatment options for all ulcers may include:
- Antibiotics, if an infection is present
- Anti-platelet or anti-clotting medications to prevent a blood clot
- Topical wound care therapies
- Compression garments
Venous ulcers are treated with compression of the leg to minimize edema or swelling. Compression treatments include wearing compression stockings, multilayered compression wraps, or wrapping an ACE bandage or dressing from the toes or foot to the area below the knee. The type of compression treatment prescribed is determined by the physician, based on the characteristics of the ulcer base and amount of drainage from the ulcer. The type of dressing prescribed for ulcers is determined by the type of ulcer and the appearance at the base of the ulcer.
Arterial ulcer treatments vary, depending on the severity of the arterial disease. Non-invasive vascular tests provide the physician with the diagnostic tools to assess the potential for wound healing. Depending on the patient’s condition, the physician may recommend testing, endovascular therapy or bypass surgery to restore circulation to the affected leg.
Neurotrophic ulcer treatment includes avoiding pressure and weight-bearing on the affected leg. Regular debridement (the removal of infected tissue) is usually necessary before a neurotrophic ulcer can heal. Frequently, special shoes or orthotic devices must be worn.
- Keeping the wound clean
- Changing the dressing as directed
- Taking prescribed medications as directed
- Drinking plenty of fluids
- Following a healthy diet, as recommended, including eating plenty of fruits and vegetables
- Exercising regularly, as directed by a physician
- Wearing appropriate shoes
- Wearing compression wraps, as directed
- Quit smoking
- Manage your blood pressure
- Control your blood cholesterol and triglyceride levels by making dietary changes and taking medications as prescribed
- Limit your intake of sodium
- Manage your diabetes and other health conditions, if applicable
- Exercise – start a walking program after speaking with your doctor
- Lose weight if you are overweight
- Ask your doctor about medication therapy to prevent blood clots