Symptoms and Signs of Blood Clots

Symptoms of blood clot occur due to obstruction of blood flow inside the blood vessels.

Signs and symptoms of a blood clot depend on the location of clot.

Arterial clots restrict oxygen-rich blood supply to the affected tissue. The patient may suffer from the following symptoms:

  • The patient may suffer from visual disturbances such as blindness, seizures and speech impairment if the clot is located in the brain. Other symptoms include severe headache, sudden loss of coordination or balance, and weakness or paralysis of one side of the body.
Blood Clots Headache
  • If the clot is located in the blood vessels of the heart, the patient may experience symptoms of angina or heart attack like chest pain, shortness of breath, irregular heartbeat, nausea and sweating.
  • If the clot forms in the intestines, the patient may experience severe pain, vomiting and bloody diarrhea.
Blood Clots Vomiting
  • If the clot is located in a limb, in addition to severe pain, the limb appears white with symptoms like loss of sensation, weakness and paralysis.

Venous clots restrict the return of blood from a particular part of the body to the heart. These types of clots commonly occur in limbs. They cause symptoms in the limb beyond the clot like:

  • Swelling
  • Redness
  • Pain
  • Numbness
  • Warmth


  1. Treatment of Blood Clots - (
  2. Blood Clots and Strokes: A Guide for Parents and Little Folks - By Maureen Andrew, Maureen Andrew, MD.
  3. Blood Clotting Disorders (Hypercoagulable States) - (

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