A platelet count of 13×10^9/L is a severe reduction in platelet count, and the patient will experience significant bleeding symptoms, manifested as bleeding spots and petechiae on the skin and mucous membranes, or even internal bleeding such as vomiting blood or black stool. For platelets only 13×10^9/L, first of all, the patient should pay attention to bed rest, reduce activities, avoid trauma, and at the same time, appropriate application of hemostatic drugs, including hemostatic minerals and other drugs. In addition, we need to actively look for the cause of the severe reduction of platelets. Generally, bone marrow aspiration and abdominal ultrasound are needed. After the cause is clearly identified, corresponding treatment will be given. For example, the most common clinical disease is immune thrombocytopenia, where platelets can be significantly reduced, and the most effective way to treat this disease is to take glucocorticoids. Platelets 13 x 10^9 / L can also be seen in aplastic anemia, myelodysplastic syndrome and other diseases, if diagnosed with these diseases, also need to give different treatment methods, such as aplastic anemia, it is necessary to take cyclosporine, Conilon and other drugs to treat.