The normal value of platelets in a healthy person is (100 to 300) × 10^ cells/L, which can vary within a certain range depending on the time of day and the functional state of the body. If it decreases to 48, it indicates that a person has an abnormality and is at risk for bleeding.
The main function of platelets is to clot and stop bleeding. When the body is injured and there is bleeding, the little things in the blood vessels called platelets gather quickly and then fight to pounce on the wound to close it to stop the bleeding, and they gather in clumps on the walls of the broken blood vessels and form clots, which then block the broken blood vessels and the bleeding stops. When the platelet count is less than 100 x 10^ units/L, it is thrombocytopenia, seen in other hematologic disorders such as acute leukemia and primary thrombocytopenic purpura.
If parents notice unexplained skin bleeding in their children, or nosebleeds, or bleeding that should not be stopped after a fall, they should promptly go to the hospital for a routine blood test. In short, if platelets are below 100, you should go to the hospital in time for a checkup, and if there are no clinical symptoms, you should review them regularly, and try to rest and refrain from strenuous activities to avoid bleeding from your own injuries.