Stasis dermatitis is a skin condition due to the build up of fluid (swelling) under the skin.

Venous stasis ulcers; Ulcers - venous

The extra fluid that builds up in the body makes it hard for the blood to feed cells and get rid of waste products. The tissue becomes poorly nourished and fragile, resulting in stasis dermatitis. The disorder is common on the ankles because there is less supportive tissue in this area.

As the skin becomes thin and inflamed, open ulcers may form and heal slowly. The skin may darken, and later become thick, perhaps due to excessive scratching of the area.

Poor circulation in the veins (venous insufficiency) can lead to stasis dermatitis and ulcers (craters) in the skin. Varicose veins, congestive heart failure, and other conditions can cause the arms and legs to swell, especially the feet and ankles.

• Swelling of legs, ankles, or other areas
• Skin appears thin, tissue-like
• Skin lesion: macule or patch
• Skin spots, red
• Darkening of skin at the ankles or legs
• Thickening of skin at the ankles or legs
• Open sores, ulcers 
• Superficial skin irritation of the legs
• Itching 
• Leg pains

The diagnosis is primarily based on the appearance of the skin. Your doctor may order tests to examine the blood flow in your legs.