6-month-old infants with rashes and vomiting manifestations may be measles, hand, foot and mouth disease and other diseases, usually according to the cause of the medication given symptomatic treatment. 1. Measles: It is an infectious disease caused by measles virus. Measles mucous membrane spots may be present in the prodromal stage, and infants may have symptoms such as vomiting and diarrhea. Red maculopapular rash will appear during the exanthematous stage. Symptomatic treatment is usually used, pay attention to skin cleanliness, and do not use antipyretics for children during the rash period. Generally, large amounts of vitamin A supplementation are needed, usually 200,000~400,000 units, taken orally once a day for 2 doses. 2. Hand, foot and mouth disease: acute febrile rash disease caused by enterovirus. Scattered rashes and herpes can be found on the body. Severe cases will involve the nervous system with persistent high fever, accompanied by vomiting and headache. Mannitol is usually needed to lower intracranial pressure, glucocorticoids such as methylprednisolone where appropriate, and immunoglobulin injections where appropriate. If your child develops a rash with vomiting, do not give your child self-medication. Medical attention is needed as soon as possible to avoid worsening of the disease. The above medications need to be used under medical supervision.