Platelet volume 6.8 is low normal and usually does not have clinical symptoms. The normal value of platelet volume is 7~11, and platelet volume 6.8 is only mildly low, which usually does not have typical clinical symptoms and has no diagnostic value. If the platelet volume is abnormally low, it may often be due to aplastic anemia, in which the platelet function is poor, and symptoms such as skin purpura and bleeding gums may occur. If the average platelet volume is greater than the normal value is too high, mainly due to excessive destruction of peripheral platelets and early release of larger platelets in the bone marrow that have not yet fully matured, such as idiopathic thrombocytopenic purpura, the platelet function is abnormal in this case, and symptoms of skin purpura may also occur. If there is abnormal examination data for a long time, it is recommended to go to the hospital in time to improve the relevant examination, so that the specialists can determine the specific causes.