What is a venous ulcer?

A venous ulcer is specifically defined as an open sore that results from inadequate venous blood flow, often associated with conditions like chronic venous insufficiency. In this condition, the veins in the legs are unable to efficiently return blood to the heart, leading to increased pressure in the veins which causes fluid to seep into surrounding tissues. This can result in skin breakdown and the formation of ulcers, particularly around the ankles and lower legs.

Such ulcers tend to be shallow and have irregular edges, and they can be quite painful. They may also have a characteristic appearance, including weeping or oozing due to the pooling of blood and fluid. Treatment focuses on improving venous circulation, managing wounds, and preventing infections.

The other answer choices relate to different types of ulcers or conditions: an open sore due to poor arterial blood flow describes arterial ulcers, while ulcers that occur due to infections apply to a variety of wound types and distinctly do not define the underlying mechanism of venous ulcers. Additionally, the notion that ulcers only occur in elderly patients is misleading, as venous ulcers can affect individuals at various ages, although they may be more prevalent in older adults due to age-related health issues. Thus, the defining characteristic of a venous ulcer lies in its