What is a common cause of venous ulcers?

Chronic venous insufficiency is a leading cause of venous ulcers. This condition occurs when the veins cannot effectively return blood from the legs to the heart. When venous circulation is impaired, blood can pool in the veins, leading to increased pressure in the capillaries. This excess pressure can damage the capillary walls, resulting in fluid leakage into the surrounding tissue and leading to edema, skin changes, and ultimately ulcers in the affected areas, particularly around the ankles and lower legs.

In contrast, while arterial occlusion can lead to ulcers, it is typically associated with arterial ulcers, which present differently in terms of location and appearance. Diabetes mellitus can lead to various types of foot ulcers, often due to neuropathy and impaired circulation, but it is not specifically linked to venous ulcers. Pressure from immobility can cause pressure ulcers, often referred to as bedsores, but it is not a direct cause of venous ulcers, which stem from issues related to venous return and circulation.