Repeated low fever after MMR vaccination requires physical cooling, medication and prompt medical attention. 1. Physical hypothermia: if the body temperature does not exceed 38 ℃, it is recommended to give the child more warm water to drink, do a good job of warmth, and at the same time through physical hypothermia to the child’s treatment, including warm water rubbing the body, ice on the forehead and warm water bath. 2. Medication: If your child’s temperature exceeds 38.5℃, you can give your child ibuprofen or acetaminophen under the guidance of a physician; if your child has repeated fevers, it is recommended that you consider giving your child oral antipyretic medication after an interval of 4 to 6 hours. 3. Timely consultation: most of the adverse reactions brought by vaccination are low fever, so if the child continues to have high fever or fever for more than 24 hours, it is necessary to consider whether it is induced by other diseases, and it is necessary to bring the child to the regular hospital to receive examination and treatment as soon as possible. The common adverse reactions of leprosy vaccine include redness, swelling, pain and hard nodules at the site of vaccination, which may cause low-fever symptoms. If you find that your child’s body is not feeling well, you should go to the hospital in time to consult the physician’s guidance, and should not blindly use medication on your own.