Colds themselves do not cause platelet lowering. Sometimes the cold and fever can cause platelet reduction, are slightly reduced, so there is no need to worry. If the decrease in platelets is more serious, we should pay attention to it actively and go to the hematology department of the hospital for examination to exclude some blood diseases. After identifying the cause, use medication under the guidance of the doctor. It is also possible, for example, to take some drugs, drugs have a certain effect on the reduction of platelets. Therefore, in this case, you must go to the hospital for a thorough examination to find out whether the cause is a blood disease or caused by the side effects of drugs.