Venous Skin Ulcer - Topic Overview
What is a venous skin ulcer?
ulcer is a type of wound that develops on the skin. A
venous skin ulcer is a shallow wound that occurs when
the leg veins don't return blood back toward the heart the way they should. This is called venous insufficiency. See a picture
of abnormal blood flow caused by venous insufficiency.
usually form on the sides of the lower leg, above the ankle and below the
calf. See a picture of
areas affected by venous skin ulcers.
Venous skin ulcers are slow
to heal and often come back if you don't take steps to prevent them.
A venous skin ulcer is also called a stasis leg ulcer.
What causes venous skin ulcers?
Venous skin ulcers are caused by poor
blood circulation from the legs, such as from venous insufficiency. Your veins have
one-way valves that keep blood flowing toward the heart. In venous
insufficiency, the valves are damaged, and blood backs up and pools in the
vein. Fluid may leak out of the vein and into the surrounding tissue. This
can lead to a breakdown of the tissue and an ulcer.
Veins that become blocked also may cause fluid to pool, leading to
Some things can increase your risk of venous skin ulcers. These include:
Deep vein thrombosis, in which a blood
clot (thrombus) forms in the deep veins of the legs.
- Lack of physical activity.
- Work that requires many hours of standing.
There are two other types of skin ulcers that can happen on the lower leg or feet. They are different from venous skin ulcers.
Arterial skin ulcers are less common
than venous skin ulcers. They happen when artery disease is present
(sometimes in combination with venous disease). These ulcers tend to be
extremely painful. They are usually on the toes and feet.
Neuropathic skin ulcers are also known as
diabetic neuropathic ulcers. They occur in people who have
little or no sensation in their feet because of diabetic nerve damage.
What are the symptoms?
The first sign of a venous
skin ulcer is skin that turns dark red or purple over the area where the blood
is leaking out of the vein. The skin also may become thick, dry, and