Vascular ulcers are wounds on the skin that form as the result of abnormal blood circulation in the body, including arterial and venous etiologies. Estimates suggest 3-5% of those over 65 in the United States have a vascular ulcer. Of those with peripheral arterial disease, approximately 20-70% have chronic wounds, according to data up to 2018. Since arterial ulcers may be underdiagnosed, certain experts theorize that the number of chronic wounds developed due to arterial insufficiency is higher in reality.