Why would the leg and ankle be swollen after hip replacement?

Swelling in the leg and/or ankle after hip replacement surgery can occur for a number of reasons. Here are a few of the most common causes:

1. Blood Clots: Blood clots, also known as deep vein thrombosis (DVT), can form in the leg after hip surgery due to reduced mobility, changes in blood flow, and damage to blood vessels. If a blood clot travels to the lungs, it can become life-threatening. Swelling in the leg, often accompanied by pain, warmth, and discoloration, can be a symptom of DVT and should be promptly evaluated.

2. Lymphatic Fluid Accumulation: Lymph nodes and vessels play an essential role in draining fluid from tissues. After hip replacement surgery, damage to the lymphatic system can occur, causing fluid to accumulate in the leg and ankle, leading to swelling.

3. Inflammation and Tissue Damage: The surgical procedure and tissue trauma during hip replacement surgery can cause inflammation and damage to surrounding muscles, ligaments, and soft tissues. This inflammation can lead to swelling in the leg and ankle as part of the body's healing response.

4. Positioning: Prolonged periods of sitting or lying down with the affected leg in a dependent position can lead to fluid accumulation and swelling in the leg and ankle. Regular movement, leg elevation, and exercises as prescribed by the healthcare provider can help reduce swelling.

5. Compression Garments: Compression stockings or wraps may be recommended after hip replacement surgery to improve blood circulation, prevent blood clots, and reduce swelling. Wearing compression garments consistently as prescribed can assist in managing swelling.

6. Infection: Infection at the surgical site or within the joint can also cause swelling in the leg and ankle. Typically, infection is accompanied by other signs such as fever, redness, and pain. Prompt medical attention is crucial if infection is suspected.

Remember that swelling after hip replacement surgery is a common experience, but if it persists, becomes excessive, or is accompanied by concerning symptoms, it's important to discuss these with your healthcare provider or surgeon to rule out any potential complications.