Regular movement of the arms and legs, blood thinners, or special stockings are often used to help prevent blood clots in someone who is bedridden. A person with inherited causes of "thick" blood or arrhythmias is often given blood-thinning medications.
A thromboembolism can cause permanent organ damage and even death. Blood clots in the leg may cause long-term swelling and pain in the leg even after the clot goes away. Permanent brain damage from a stroke can leave people unable to walk, talk, or take care of themselves.
A thromboembolism is not contagious and poses no risks to others.