Low platelet count means that the number of platelets in the peripheral blood is significantly lower than normal. The main function of platelets is to stop bleeding, and when the platelet count is too low, the body’s hemostatic function will be affected, so it is easy to get bleeding disorders. These bleeding disorders include: 1) bleeding in the gastrointestinal tract, where the patient shows vomiting blood, black stool, and sometimes hemorrhagic shock, which requires transfusion of blood cells, platelet transfusion, and treatment with drugs such as omeprazole and oxytetracycline; 2) bleeding in the urinary tract, where the patient will have hematuria in the naked eye, which also requires platelet transfusion and hemostatic treatment with drugs such as hemostatic minerals; 3) The most serious situation is to get brain bleeding after too few platelets, which is the most serious complication. Patients show sudden headache, loss of consciousness, coma, and in serious cases, brain herniation, which may even lead to the death of the patient. At this time, in addition to platelet transfusion, mannitol should be applied to reduce intracranial pressure, and if necessary, craniotomy should be given.