Sudden swelling in one leg or arm
Pain or tenderness in the leg, often in the calf
Warmth in the affected area
Red or discolored skin on the leg or arm
A leg that feels tight, heavy, or cramp-like
Shortness of breath
Chest pain that may get worse with deep breathing
Fast heartbeat
Coughing up blood
Sudden dizziness or fainting
One leg larger than the other
Symptoms that appear suddenly without a clear cause
Seek emergency care right away if you have chest pain, trouble breathing, or coughing up blood