The signs and symptoms of thrombosis depend on the location of the affected vessel and the severity of the clot, according to the Indiana Hemophilia and Thrombosis Center. Although symptoms are not always present, signs include pain, swelling, discoloration, redness and inflammation.
Additional symptoms of deep vein thrombosis include pain when flexing the foot and evidence of collateral circulation, explains the Indiana Hemophilia and Thrombosis Center. Pulmonary embolism symptoms include rapid breathing, a dull ache in the chest, sweating, anxiety and fatigue.
Thrombosis is the presence of a blot clot in any vein or artery, according to MedicineNet. More than 2 million people experience deep vein thrombosis each year in the United States, reports the Indiana Hemophilia and Thrombosis Center.