Venous ulcers are open sores that typically develop on the lower legs and ankles due to poor blood circulation. They occur when veins struggle to return blood to the heart, leading to increased pressure and fluid buildup in the surrounding tissues. This condition often results from chronic venous insufficiency, where the valves in the veins do not function properly. These ulcers can be painful and may take a long time to heal. Treatment often includes improving blood flow through compression therapy, wound care, and addressing any underlying health issues. Proper management is essential to prevent infection and promote healing.