DVT can happen at any age. However, it is most commonly found in people over 60 years of age. Blood clusters take shape when there are changes in the blood stream in the veins. The point where a coagulation severs and travels through the circulation system is called embolism. There are several causes of Deep Vein Thrombosis. Some of them are: Fracture in legs or pelvis Pregnancy Obesity Family history of blood clusters Excessive number of platelets made by bone marrow Having an in-dwelling catheter in a vein Blood will probably clump with if a person has the following issues: Cigarette smoking Immune system issues such as lupus Cancer Taking estrogen or conception prevention pills Sitting for long stretches when travelling can increase the possibility of this condition. The possible treatments for this include the following: Vena cava filter : In this, blood typically goes through the filter. It goes in the vena cava, which takes blood from the lower body back to the heart. The filter gets blood clusters and prevents them from moving to those parts of your body where they can prove to be harmful. The filter is placed on an arm, leg, or neck vein and moves it into the belly vein.