well it depends. let's talk for a moment about blood clots. there are different types of blood clots. when you get a cut on your finger it bleeds and then eventually the blood gets very thick and the active bleeding stops. that thickened blood is a clot. it eventually will become a scab. this type of clot is a "good" clot because it stops you from bleeding too much. however just as there are "good" clots there also are "bad" clots. a deep vein thrombosis (dvt) is a type of blood clot that occurs deep in a vein usually in the leg. this type of clot usually is caused by poor circulation. a dvt can break loose and travel to the brain where it can cause a stroke. it also can travel to the lung where it can cause a pulmonary embolism. i hope this response and the links will give you all the information you need.
can a blood clot losen and move and get stuck somewhere else