After the MMR vaccination, the rash should not be exposed to water, should not be scratched, and can be coated with glycerine lotion to stop itching, keep the local area dry and hygienic, and go to the hospital for treatment if necessary. Scattered red rash after MMR vaccination is likely to be caused by the adverse reaction of vaccination, at this time, we should pay attention to a light diet, avoid scratching the red rash caused by infection, the red rash should not be wet, and we must keep the body hygiene and clean to avoid infection. If the rash is very itchy, you can apply glycerin lotion to stop the itching. If the rash is triggered by drug allergy, generally the rash is extensive and itching is heavy, it is recommended to go to the hospital for treatment, pay attention to observe the patient’s mental state, especially if it is accompanied by dyspnea, lip edema need to be treated in a timely manner, to avoid delaying the condition, can be taken under the guidance of a doctor, such as Loratadine, Paracetamol and other desensitization drugs for treatment, and other matters of concern are the same as those mentioned above.