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1 When blood clots occur in a vein, symptoms may include. 2  pain, 3  swelling, 4  warmth, and. 5  redness. 6  If a forms in a vein in a leg or arm breaks; breaks off and travels to the lung a pulmonary embolus can occur. 7  Symptoms of pulmonary embolism are chest pain and shortness of breath.
1 Blood clots. 2  A blood clot in your leg may cause your leg to swell, appear red and warm, and/or cause pain. 3  A blood clot in your lungs may cause trouble breathing, pain when breathing, and/or chest pain. 4  Changes in your liver function.5  Your doctor will check your liver function as needed. Generalized weakness and discomfort (aches or pains). 2  Decreased appetite (decreased hunger). 3  Blood clots. 4  A blood clot in your leg may cause your leg to swell, appear red and warm, and/or cause pain. 5  A blood clot in your lungs may cause trouble breathing, pain when breathing, and/or chest pain.