Swelling in the left ankle can have multiple causes, typically related to either fluid buildup (edema) or inflammation. Common reasons include injury (such as a sprain or strain), prolonged standing or sitting, certain medications, infections, or underlying medical conditions affecting the heart, kidneys, or liver. More specific causes for swelling in just one ankle include deep vein thrombosis (a blood clot), venous insufficiency (impaired vein function), lymphedema (lymph fluid buildup), or minor trauma that may not be painful. If the swelling is severe, painful, red, hot, persists without improvement, or is accompanied by other symptoms like shortness of breath, urgent medical consultation is advised.
Common Causes
- Injury such as a strain or sprain causing inflammation and swelling.
- Edema from fluid buildup due to prolonged immobility, high salt intake, or being overweight.
- Infection, such as cellulitis, causing localized swelling and possibly redness or warmth.
- Medications like blood pressure drugs, steroids, or hormones can cause fluid retention.
- Venous insufficiency where veins don’t pump blood effectively back to the heart.
- Serious conditions like deep vein thrombosis leading to blood clots can cause one ankle to swell.
When to See a Doctor
- If swelling is sudden, severe, or painful.
- If swelling is only in one ankle without a clear cause.
- If the skin is red, warm, or you have a fever.
- If you experience shortness of breath or chest pain, which could indicate a serious complication like a blood clot in the lungs.
Swelling in the ankle often improves with rest, leg elevation, gentle exercise, and avoiding tight footwear or prolonged standing/sitting. However, persistent or worsening swelling should be evaluated by a healthcare professional for proper diagnosis and treatment.
