Sudden Redness and Swelling in One Leg: Causes and What to Know
1. Deep Vein Thrombosis (DVT)One of the most serious causes is deep vein thrombosis (DVT), which occurs when a blood clot forms in a deep vein, often in the calf or thigh. The clot can block blood flow, leading to swelling, redness, warmth, and pain in the affected leg. DVT is dangerous because the clot…
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