This can be caused by certain medications that "thin" the blood in various ways such as aspirin, plavix, coumadin and others such as Pepcid. It can also be caused by liver disease since the liver is one of the organs that helps to maintain the proper levels of blood components. Bone marrow performance can be the problem since that is where many of the blood cells are either formed or signaled to be formed. You would need to see the doc to go over the medicines that you are taking and to review some simple blood tests. It may be necessary to do a "bone marrow biopsy" where a needle is inserted into the hip or the breastbone to remove a small amount of the bone marrow for testing.
What meds are you on; if you like I will look them up to see if it could be caused by one of them.
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