Platelet volume is generally the average platelet volume, the normal value is 7.8~11fl, 5.8fl belongs to the low, but whether it is normal or not, should be analyzed on a case-by-case basis. If the patient’s other test results show normal, and no discomfort symptoms, the average platelet volume of 5.8fl belongs to the normal physiological phenomenon, and vice versa belongs to the abnormal situation. 1. If the patient’s other test results are normal, such as platelets, hemoglobin, white blood cells, etc., and there are no uncomfortable symptoms, this time the average platelet volume is low generally has no clinical significance, and belongs to the normal physiological phenomenon. 2. When the patient’s average platelet volume is low, accompanied by other abnormalities, such as low hemoglobin, low white blood cells, low platelets, and the patient has uncomfortable symptoms, such as fatigue, dizziness, etc., which may be related to hemorrhagic disease, hematopoietic dysfunction (aplastic anemia), and the toxic side effects of chemotherapy, and so on, this time, the average platelet volume of 5.8fl is not normal phenomenon. If the average platelet volume of the patient is 5.8fl, further relevant examinations should be done, and the doctor should make a diagnosis and carry out treatment according to the specific conditions of the patient.