Platelets are blood cells made in bone marrow that allow blood to clot and cuts and abrasions to heal. Platelet disorders can arise from having an irregular number of platelets. Too few inhibit the body’s ability to heal; too many may cause blood clots that can block circulation. Symptoms of platelet disorders include: unexplained bruising, bleeding from the nose, mouth or gums, bleeding under the skin, or internal bleeding. Blood analysis is used to diagnose the disorder and treatment varies according to whether the bleeding is active. There are many options available to alleviate or treat the condition.