When there is a cold, the blood test is to check the blood routine, because most of the colds are viral infections, the check of blood routine will find that the lymphocyte proportion of the increase, for the diagnosis of the cold has a certain degree of help, and for the diagnosis of the cold, mainly according to the patient sneezing, runny nose, nasal congestion and other symptoms. Colds can be treated with relevant medications, such as Four Seasons Antiviral Combination, Pu Di Lan Anti-inflammatory Oral Liquid, Ban Lan Gen Granules or Cold Ling Granules, which are all more effective.