Can you explain the difference between venous and arterial leg ulcers?

Arteries vs. Veins: Venous ulcers are usually due to venous hypertension (unusually high pressures in the veins for a long period of time). They occur most commonly on the inside of the ankles. Arterial ulcers occur due to poor circulation or blockage in the arteries. These most commonly occur in the toes or the heels. Among other things, diabetes affects the circulation in the toes and feet.

The short answer: Many ulcers have combined venous and arterial features. Venous ulcers are due to high pressures in the veins either from previous DVT or insufficiency. They often affect the ankle region. Compression is the mainstay of treatment and often surgery as well. Arterial ulcers are typically due to "blocked" vessels often affect the foot/toes and may require surgery to restore the flow.

DIfferences: Venous ulcers are usually occur over the inside or outside of the ankle, have irregular, less distinct orders, might not be very painful, and are associated with varicose veins that are causing other skin changes besides the ulcer. Arterial ulcers are often associated with other conditions like diabetes, smoking, and hypertension. These ulcers have more clear cut borders and usually hurt.

Ulcer artery vs vein: Venous ulcers are due to high blood pressure of the veins resulting in the leakage of fluid into the tissues of the legs. Compression of the lower extremities and surgery on the veins can correct this. Ischemic ulcers are due to problems with arteries. There are larger arteries and small microscopic ones and either or both can have blockages. They usually can be discerned from each other.