If the symptoms of the MMR vaccine rash are mild, then observation is the main concern, and if the symptoms continue to worsen, then prompt medical attention is required.
Rash after MMR vaccination is mainly considered to be caused by adverse reaction to the vaccine. Allergy to some components of the vaccine can cause similar symptoms. In general, the degree is relatively mild, no special treatment is needed, observation is the main focus, and the rash can subside in 3~5 days on its own.
However, if the rash symptoms continue to worsen, accompanied by itching and other manifestations, it is necessary to consult a doctor in a timely manner. Blood tests should be carried out, and antihistamine treatment, such as loratadine, should be used. At the same time to observe whether there is dyspnea and other manifestations, such as the emergence of the need for timely rescue, to avoid leading to adverse consequences.