Trapping of platelets in the spleen, reduced production of platelets, and increased platelet breakdown can all lead to low platelet count, according to Mayo Clinic. The blood normally has between 150,000 and 450,000 plat... More » Health Medical Ranges & Levels

A person can have low blood platelet count, or thrombocytopenia, because of genetic history or medical conditions, according to Mayo Clinic. Drugs such as those used in chemotherapy can also cause a low platelet count. More »

Thrombocytopenia, or low platelet count, can run in families or be a result of some drugs and medical conditions, according to WebMD. Viral infections, including chickenpox and hepatitis C, can be causes. More » Health Medical Ranges & Levels

Low platelet count, or thrombocytopenia, is caused by such conditions as an enlarged spleen, which may trap too many platelets and remove them from blood circulation; bone marrow destruction due to cancer and its treatme... More »

The dangers of a low blood platelet count, or thrombocytopenia, are internal bleeding, including brain bleeds, that can become dangerous, according to Mayo Clinic. Women with thrombocytopenia have periods that are heavie... More »

A critically low platelet count is anywhere between 10,000 to 20,000 platelets per microliter of circulating blood, according to Spontaneous bleeding can occur when platelets are in this range. More »

A person's blood platelet count is considered low when it is less than 150,000 platelets per microliter during a blood test and dangerously low when under 50,000, according to MedlinePlus. The Platelet Disorder Support A... More »