Leg/skin ulcers
medical conditions

Leg/skin ulcers

Explore the available health information, treatment context, and integrative evidence for Leg/skin ulcers.

Background
  • Skin ulcers are open sores that are often accompanied by the sloughing-off (shedding) of inflamed tissue. Skin ulcers can be caused by a variety of events, such as trauma, exposure to extreme temperatures or corrosive material, or problems with blood circulation.
  • Venous leg ulcers are the most common type of skin ulcer. They mainly occur just above the ankle. They usually affect older people and are more common in women. About one out of 50 people develop a venous leg ulcer at some stage in their lives. Venous leg ulcers are usually painless, but they may cause pain in some cases. Without treatment, an ulcer may become larger and cause problems in the leg, such as infection.
  • Pressure ulcers, also known as decubitus ulcers or bedsores, are skin ulcers that develop on areas of the body where the blood supply has been reduced because of prolonged pressure. Pressure ulcers may occur in people confined to bed or a chair, or in those who must wear a hard brace or plaster cast. Skin ulcers may become infected, which may lead to complications such as sepsis (infection in the blood).
  • Other health conditions that can cause skin ulcers include chronic venous insufficiency, diabetes, infections, and a disease of the blood vessels that supply the blood to the limbs called peripheral vascular disease.
Signs and Symptoms
  • Venous skin ulcers
    :
  • The first sign of a venous skin ulcer is the appearance of dark red or purple skin over the affected area. The skin may also become thickened and dry and itchy. Without treatment, an ulcer may form. The wound may be painful, and the individual may also have swollen and achy legs. Rashes may occur, such as contact dermatitis, on the skin around the ulcer.
  • Because venous skin ulcers are a result of poor blood circulation, these wounds are often slow to heal. If an ulcer becomes infected, there may be an odor, pus draining from the wound, and increased tenderness and redness.
  • One or more ulcers may develop on the leg or both legs. The outer layers of skin die and are shed (sloughed), exposing deeper tissues. Spots of white scar tissue may develop in the skin around a venous ulcer.
  • If venous ulcers result from chronic venous insufficiency, the legs are swollen, and the skin is dark reddish brown and very firm (a condition called stasis dermatitis). The skin may itch, and the ulcers are usually very painful.
  • Cellulitis, a type of infection of the skin, often develops around a venous ulcer. Typically, the infected skin is red, warm, swollen, and tender. Red streaks occasionally appear. Pus or fluid may leak from the ulcer, especially if infection involves tissues below the skin (such as muscle).
  • Pressure ulcers
    :
  • Bedsores fall into one of four stages based on their severity. Pressure sores are categorized by severity, from Stage I (earliest signs) to Stage IV (worst). The National Pressure Ulcer Advisory Panel, a professional organization dedicated to the prevention and treatment of pressure sores, has defined each stage as follows:
  • Stage I: Initially, a pressure sore appears as a persistent area of red skin that may itch or hurt and feel warm and spongy or firm to the touch. In African Americans, Hispanics, and other people with darker skin, the mark may appear to have a blue or purple cast, or look flaky or ashen. Stage I wounds are superficial and go away shortly after the pressure is relieved.
  • Stage II: In stage II, some skin loss has already occurred, either in the epidermis, the outermost layer of skin, in the dermis, the skin's deeper layer, or in both. The wound is now an open sore that looks like a blister or an abrasion, and the surrounding tissues may show red or purple discoloration. If treated promptly, stage II sores usually heal fairly quickly.
  • Stage III: When a pressure ulcer reaches stage III, the damage has extended to the tissue below the skin, creating a deep, crater-like wound.
  • Stage IV: Stage IV is the most serious and advanced stage. The pressure ulcer has become so deep that there is damage to the muscle and bone, and sometimes tendons and joints. Stage IV wounds are extremely difficult to heal and can lead to lethal infections.
  • If an individual uses a wheelchair, he/she is most likely to develop a pressure sore on the tailbone or buttocks, the shoulder blades and spine, or the backs of the arms and legs where they rest against the chair. When an individual is bedridden, pressure sores may occur on the back or sides of the head; the rims of the ears; the shoulders or shoulder blades; the hipbones, lower back, or tailbone; or the backs or sides of the knees, heels, ankles, and toes.
Diagnosis
  • Venous skin ulcer: The appearance of a venous leg ulcer looks different than ulcers caused by other problems such as poor circulation or nerve problems. To rule out poor circulation as a cause, it is usual for a doctor or nurse to check the blood pressure in the ankle and in the arm. The ankle blood pressure reading is divided by the arm blood pressure reading to give a blood pressure ratio called the Ankle Brachial Pressure Index (ABPI). If the ratio is low, it indicates that the cause of the ulcer is likely to be poor circulation rather than venous problems. This is very important to know as the treatments are very different. An ABPI may be checked routinely to make sure the circulation to the legs remains adequate.
  • Routine blood and urine tests may also be done to rule out diseases that may cause or aggravate skin ulcers, such as anemia, diabetes, kidney failure, or arthritis.
  • Pressure ulcers: Pressure sores (bedsores) are usually unmistakable, even in the initial stages, but a doctor is likely to order blood tests to check the individual's nutritional status and overall health. Other tests may include: urine analysis and culture, stool culture, and a wound biopsy. A wound biopsy is a sample of tissue is taken from wounds that do not heal or from chronic (long-term) pressure sores. The tissue may also be checked for cancer, which is a risk in individuals with chronic wounds.
Complications
  • Bone and joint infections:
    Bone and joint infections
    develop when the infection from a bedsore burrows deep into the joints and bones. Joint infections, known as septic or infectious arthritis, can damage cartilage and tissue within days, whereas bone infections (osteomyelitis) may develop over years if not treated. Eventually, bone infections can lead to reduced function and bone death, which may require amputation.
  • Cellulitis: Cellulitis is a potentially serious bacterial infection of the skin. The most common bacteria that cause cellulitis are Streptococcus pyogenes and Staphylococcus aureus. Cellulitis appears as a swollen, red area of skin that feels hot and tender and it may spread rapidly. Skin on the face or lower legs is most commonly affected by this infection, though cellulitis can occur on any part of the body. Cellulitis may only affect the surface of the skin. However, cellulitis may also affect the tissues underlying the skin and can spread to lymph nodes and the bloodstream. Left untreated, the spreading bacterial infection may rapidly turn into a life-threatening condition.
  • Necrotizing fasciitis: Necrotizing fasciitis is a rapidly spreading infection that destroys the layers of tissue that surround the muscles. Initial signs and symptoms include fever, pain, and massive swelling. Without treatment, death can occur in as little as 12-24 hours.
  • Gas gangrene (myonecrosis): Gas gangrene is a
    rare and severe form of gangrene. Gas gangrene develops suddenly and dramatically and spreads so rapidly that changes in tissue are noticeable within minutes. The bacteria responsible for gas gangrene (Clostridium sp.) produce toxins that completely destroy affected muscle tissue and cause potentially fatal systemic problems. Amputation of the infected limb may be required.
  • Sepsis: Sepsis (a blood infection) can occur from a wound such as advanced pressure sores. Sepsis occurs when bacteria from a massive infection enter the bloodstream and spread throughout the body. Sepsis is a rapidly progressing, life-threatening condition that can cause shock and organ failure.

Treatment
  • Venous skin ulcer
    :
  • Compression bandaging: Compression bandaging is the most important treatment for venous skin ulcers. This counteracts the raised pressure in the leg veins, which gives the best chance for the ulcer to heal. The common method is to put on three to four layers of bandages over the dressing, with the highest pressure at the ankle, and gradually decreasing towards the knee and thigh. A compression stocking over the dressing is sometimes used as an alternative, but not thought to be as good as bandaging. The bandages are re-applied every week or so when the ulcer dressing is changed. When using a compression bandage, the individual should still be able to move the ankle. It is important not to have the compression too tight or it may affect the circulation in the legs. Bandages should be removed immediately if the foot changes color or temperature or if there is increasing pain in the legs. A doctor should be consulted immediately if pain, temperature, or color of the area changes.
  • Elevation and activity:
    When at rest, healthcare professionals recommend that individuals try to keep the leg elevated (raised) higher than the hip. This is particularly important if the leg is swollen. The aim is to let gravity help to pull fluid and blood in the right direction - towards the heart. This reduces swelling in the leg and reduces the pressure of blood in the leg veins.
  • It is also recommended to try to set three or four periods per day of about 30 minutes to lie down with the leg raised. It is important not to spend too much time in bed or resting. Keeping active and performing normal activities is important. If possible, regular walks are good, but do not stand for long periods.
  • When sleeping, it is important to try to keep the leg raised. Pillows under the bottom of the mattress can be used.
  • Smoking cessation: Smoking cessation is important to decrease the risk of developing a venous skin ulcer. The chemicals in cigarettes may interfere with the skin healing.
  • Antibiotics: Antibiotics are sometimes used for short periods if the skin and tissues around the ulcer become infected.
  • Pain management: Medications for pain may be prescribed if the ulcer is painful. Medications may include non-steroidal anti-inflammatory drugs, such as ibuprofen (Motrin®), or opiates, such as hydrocodone (Vicodin®, Lortab®).
  • Other treatments: Other treatments for venous skin ulcers include a healthy diet (such as increasing green, leafy vegetables and decreasing fatty foods) and surgery.
  • Most venous ulcers heal within 12 weeks if treated with compression bandaging. If compression is not used and an ordinary dressing or compression stockings alone are used, healing is inhibited.
  • Pressure ulcers
    :
  • Once a pressure ulcer is identified, steps must be taken immediately to: relieve the pressure on that area by using pillows, special foam cushions, and sheepskin; treat the sore based on the stage of the ulcer - a healthcare provider will give specific treatment and care instructions; avoid further trauma or friction by powdering the sheets lightly to decrease friction in bed; And improve nutrition and other underlying problems that may affect the healing process. If the pressure ulcer is at Stage II or worse, a healthcare provider will give specific instructions on how to clean and care for open ulcers to prevent infection. Keeping the area clean and free of dead tissue is also important. A healthcare provider will give specific care directions. Generally, pressure ulcers are rinsed with a salt-water rinse to remove loose, dead tissue. The sore should be covered with special gauze dressing made for pressure ulcers. Do not massage the area of the ulcer, as massage may damage tissue under the skin. Donut-shaped or ring-shaped cushions are not recommended. They interfere with blood-flow to that area and cause complications, such as pressure sores.
  • Non-surgical treatment: Treating pressure sores is challenging. Open wounds are slow to close, and because skin and other tissues have already been damaged or destroyed, healing may be imperfect. Although it may take some time, most stage I and stage II sores will heal with conservative measures. But stage III and stage IV wounds, which are less likely to resolve on their own, may require surgery.
  • The first step in treating a sore at any stage is relieving the pressure that caused it. Pressure can be reduced by: changing positions often. Carefully follow a schedule for turning and repositioning - approximately every 15 minutes if in a wheelchair and at least once every two hours when in bed. If the individual is unable to change positions on their own, a family member or other caregiver may help. Using sheepskin or other padding over the wound can help prevent friction when moving.
  • Using support surfaces is important.
    These are special cushions, pads, mattresses, and beds that relieve pressure on an existing sore and help protect vulnerable areas from further breakdown. The most effective support depends on many factors, including the individual's level of mobility, their body build, and the severity of their wound. Healthcare professionals recommend avoiding using pillows and rubber rings, which actually cause compression.
  • Sleeping mattress should be low-air-loss beds or air-fluidized beds. Low-air-loss beds use inflatable pillows for support, whereas air-fluidized beds suspend the individual on an air-permeable mattress that contains millions of silicon-coated beads. These beads help cushion areas of the body susceptible to pressure sores, such as the buttocks.
  • Other non-surgical treatments of pressure sores include cleaning the wound to prevent infection. A stage I wound can be gently washed with water and mild soap, but open sores should be cleaned with a saltwater (saline) solution each time the dressing is changed. Saline solution is available at a pharmacy or can be made at home by boiling 1 teaspoon of salt in 1 quart of water for five minutes. It is recommended by healthcare professionals to store the solution in a sterile container and cool before using. It is best to avoid antiseptics such as hydrogen peroxide and iodine, which can damage sensitive tissue and delay healing.
  • Controlling incontinence as far as possible is crucial to helping sores heal. If the individual is experiencing bladder or bowel problems, they may be helped by lifestyle changes, behavioral programs, incontinence pads, or medications.
  • To heal properly, wounds need to be free of tissue that is damaged, dead, or infected. One approach to removing dead tissue is surgical debridement, a procedure that involves using a scalpel or other instrument to remove dead tissue. Surgical debridement is quick and effective, but it can be painful. A doctor may use one or more non-surgical approaches. These include removing devitalized tissue with a high-pressure irrigation device (mechanical debridement), allowing the body's own enzymes to break down dead tissue (autolytic debridement), or applying topical debriding enzymes, such as Granulex®.
  • Dressings: A variety of dressings are used to help protect wounds and speed healing. The type of dressing used usually depends on the stage and severity of the wound. The basic approach, however, is to keep the wound moist and to keep the skin surrounding the wound dry. Stage I sores may not need any covering, but stage II lesions are usually treated with hydrocolloids or transparent semi-permeable dressings that retain moisture and encourage skin cell growth. Examples of hydrocolloid dressings include Tegasorb® and Relicare®. Other types of dressings may be more beneficial for weeping wounds or those with surface debris. Contaminated sores may also be treated with a topical antibiotic cream.
  • Hydrotherapy: Whirlpool baths can aid healing by keeping skin clean and naturally removing dead or contaminated tissue. Whirlpool baths used for burn treatment are specialized, stainless steel baths used by trained healthcare professionals.
  • Healthful diet: Eating a nutritionally rich diet with adequate calories and protein and a full range of vitamins and minerals, especially vitamin A~, vitamin C~, Vitamin E~, iron~, and zinc~, has been reported to improve wound healing. A well nourished body can produce healthful skin, which guards against breakdown.
  • Surgical repair: The goals of surgical repair include improving the appearance of the sore, preventing or treating infection, reducing fluid loss through the wound, and lowering the risk of future cancer. The type of reconstruction that's best in any particular case depends mainly on the location of the wound and whether there's scar tissue from a previous operation. In general, though, most pressure wounds are repaired using a pad of muscle, skin, or other tissue that covers the wound and cushions the affected bone (flap reconstruction). The tissue is usually harvested from the individual's own body. In spite of every precaution, flap reconstruction has one of the highest complication rates of any surgery, and the recovery period is long and arduous. Individuals must have a strong social support system, optimal nutritional status, state-of-the-art resources such as a pressure-release bed, and the ability and motivation to participate in their own recovery to be a candidate for this operation.
  • Other treatment options: New treatment options for wound healing include hyperbaric oxygen, electrotherapy, and the topical use of human growth factors. Growth factors, proteins that stimulate cell growth, have been approved for the treatment of diabetic ulcers but have not been approved for pressure sores to date.
Prevention
  • Venous leg ulcers commonly recur after they have healed. To prevent this, individuals should wear support (compression) stockings during the daytime for at least five years after the ulcer has healed. This counteracts the raised pressure in the veins that causes venous leg ulcers. A new stocking should be purchased about every six months, as the elastic tends to degrade.
  • There are different classes (strengths) of compression stockings - class I, II, and III. The higher the class (class three), the greater the compression. Ideally, healthcare professionals recommend that patients with venous leg ulcers wear class three stockings. However, some people find class three stockings too tight and uncomfortable. In such cases, class two may be fine; it is still best to wear some sort of compression stocking than none at all.
  • Underlying conditions, such as diabetes, should be controlled. A healthcare provider will work with the individual to help control daily blood sugar levels.
  • If bedridden or immobile with diabetes, circulation problems, incontinence, or mental disabilities, healthcare providers recommend that the individual be checked for pressure sores every day. Also, look for reddened areas that, when pressed, do not turn white. It is important to look for blisters, sores, or craters. In addition, take the following steps: change position at least every two hours to relieve pressure; use items that can help reduce pressure (such as pillows, sheepskin, foam padding, and powders from medical supply stores); eat healthy, well-balanced meals; exercise daily, including range-of-motion exercises for immobile patients; and keep the skin clean and dry. Incontinent people need to take extra steps to limit moisture in the genital area.
  • Individuals with diabetes should check their feet daily for blisters, sores, or other wounds in order to prevent serious infection and possibly amputations.
References
  1. American Academy of Family Physicians. . Accessed April 12, 2009.
  2. American Academy of Pediatrics. . Accessed April 12, 2009.
  3. Arnold M, Barbul A. Nutrition and wound healing. Plast Reconstr Surg. 2006;117(7 Suppl):42S-58S. . View Abstract
  4. Centers for Disease Control and Prevention. . Accessed April 12, 2009.
  5. Dini V, Bertone M, Romanelli M. Prevention and management of pressure ulcers. Dermatol Ther. 2006;19(6):356-64.
    View Abstract
  6. Langemo D, Anderson J, Hanson D, et al. Nutritional considerations in wound care. Adv Skin Wound Care. 2006;19(6):297-8, 300, 303.
    View Abstract
  7. de Laat EH, Schoonhoven L, Pickkers P, et al. Epidemiology, risk and prevention of pressure ulcers in critically ill patients: a literature review. J Wound Care. 2006;15(6):269-75.
    View Abstract
  8. Natural Standard: The Authority on Integrative Medicine. . Copyright © 2009. Accessed April 12, 2009.
  9. National Institute of Allergy and Infectious Diseases. . Accessed April 12, 2009.
  10. Pieper B, Sieggreen M, Nordstrom CK, et al. Discharge knowledge and concerns of patients going home with a wound. J Wound Ostomy Continence Nurs. 2007;34(3):245-53; quiz 254-5.
    View Abstract
  11. Wu SC, Driver VR, Wrobel JS, et al. Foot ulcers in the diabetic patient, prevention and treatment. Vasc Health Risk Manag. 2007;3(1):65-76.
    View Abstract