👉 Subdrainage is a medical condition that occurs when blood flows back into the veins of the lower extremities, often due to an injury or infection. This can occur in various areas of the body, such as the knee joint, ankle, foot, and toes. The term "subdrainage" refers to the process by which blood is redirected back into the veins of the lower extremities after being injured or infected. The specific cause of subdrainage can vary widely depending on