1. Deep Vein Thrombosis (DVT)
A serious condition where a blood clot forms in a deep vein, often in the calf or thigh. Symptoms include swelling,
redness, warmth, and pain. Dangerous because clots can travel to the lungs, causing a pulmonary embolism. Risks:
immobility, surgery, pregnancy, smoking, obesity, and some medications. Sudden swelling with pain or shortness of breath needs urgent care.