5. Injury
A severe injury or trauma to a vein deep in the legs may result in the onset of deep vein thrombosis in the affected individual. Trauma such as a broken femur bone, due to a severe injury or car accident, can cause an acute clot in one of the large arteries found in the upper legs.
As a result of the trauma causing the onset of deep vein thrombosis, the patient may require immediate surgery to remove the clot and prevent it from moving up towards the heart. In severe cases, if the patient does not receive surgery to remove the clot or the necessary medications to mitigate its size, it may move up towards the heart, causing a heart attack in the affected individual.
The irritation or injury of veins that are deep in the body is a far more serious case than superficial phlebitis. However, some cases of DVT do not require immediate surgery and can do well with the administration of anticoagulant medications designed to shrink the size of the clot.