signs and symptoms of blood clots medical attention immediately sudden and severe headache; dizziness areas of the upper body shortness of breath light-headedness up blood abdominal pain treatment can include thrombolytic tion to prevent blood clots from forming longer or can go on indefinitely arms or legs swelling discomfort discolored skin skin that's warm to the touch sudden or gradual pain not caused by injury risk reduction there are steps you can take to reduce the risk of blood clots • recognize the signs and symptoms • ask your doctor about blood clot pre- medical recovery that leaves you immobile work or during lengthy road trips or airplane hours to get up and walk around steps to quit smoking • seek medical help immediately if you do have signs or symptoms based outside chicago