A single swollen leg isn’t something to ignore—it can point to a few different conditions, some more serious than others.
One of the most important possibilities is Deep Vein Thrombosis (DVT). This is a blood clot in a deep vein, usually in the leg. It can be dangerous because the clot can travel to the lungs.
Other possible causes include:
- Injury or muscle strain
- Infection (like Cellulitis)
- Poor circulation or vein problems (like varicose veins)
- Lymphatic blockage (lymphedema)
Warning signs of something serious (like DVT):
- Swelling in only one leg
- Pain or tenderness (often in the calf)
- Warmth or redness
- Skin that feels tight
What to do:
- Seek medical care urgently if the swelling is sudden, painful, or unexplained
- Especially urgent if there’s shortness of breath or chest pain (could mean the clot has moved)
If you want, describe the swelling (painful or not, how long it’s been there, any redness), and I can help narrow it down further.
