Blood clots form when platelets (blood components) and plasma proteins thicken, forming a semisolid mass. This process may be triggered by an injury or it can sometimes occur inside blood vessels that don't have an obvious injury.

Once these clots form, they can travel to other parts of your body, causing harm. Factors and conditions that can cause troublesome blood clots, as well as serious conditions that are associated with blood clots, include:

  1. Antiphospholipid syndrome
  2. Arteriosclerosis / atherosclerosis
  3. Certain medications, such as oral contraceptives, hormone therapy drugs and some breast cancer medications
  4. Deep vein thrombosis (DVT)
  5. Factor V Leiden
  6. Family history of blood clots
  7. Heart arrhythmias
  8. Heart attack
  9. Heart failure
  10. Obesity
  11. Peripheral artery disease
  12. Polycythemia vera
  13. Pregnancy
  14. Prolonged sitting or bed rest
  15. Pulmonary embolism (blood clot in an artery in the lung)
  16. Smoking
  17. Stroke
  18. Surgery

Causes shown here are commonly associated with this symptom. Work with your doctor or other health care professional for an accurate diagnosis.

June 02, 2016