1. Unexplained Swelling
Sudden swelling—especially in the leg, ankle, or arm—is a common sign of a blood clot. The swelling usually occurs on one side of the body and may feel warm to the touch.
2. Sharp Pain or Tenderness
A clot in a deep vein can cause throbbing or cramping pain that doesn’t go away with rest. The pain often starts in the calf or thigh and worsens when walking or standing.
