A blood clot is a mass of blood that changes from liquid to a gel-like or semisolid state. A blood clot forms to try and repair damage to a blood vessel, either an artery or vein. A clot in a vein close to the skin’s surface reason for itching sensation yet typically doesn’t lead to serious problems.
A blood clot that develops in the deep veins of your leg, if left untreated and unable to dissolve of its own volition, may detach and travel to your lungs, causing a pulmonary embolism Blood clots in the leg can form spontaneously, following trauma, long flights, or after surgery.
The symptoms of a blood clot in the leg include:
- Leg swelling
- Calf pain
- Calf tenderness
A clot that develops in a vein deep in the lower abdomen or legs, called a deep-vein thrombosis, can interfere with blood flow, often causing swelling and inflammation.
A blood clot in your brain could cause a sudden and severe headache along with some other symptoms, including sudden difficulty speaking or seeing. Symptoms of blood clots depend on their location in the body. Some blood clots produce no symptoms until they rupture or become dislocated and travel through the circulatory system to other sites.
Up to 100,000 people die each year in the United States from such pulmonary embolisms, according to the Centers for Disease Control and Prevention. Prevention of blood clots involves attention to the risk factors for vascular disease and includes avoiding smoking and lifelong control of high blood pressure, high cholesterol, and diabetes.