The measles vaccine is a live attenuated vaccine, and measles and rubella are both diseases that cause a rash. Therefore, after receiving the measles vaccine, the corresponding reactions similar to the disease will occur, and the most common reaction is a rash on the body, with an incidence of about 10-20%. The rash may be accompanied by a fever, and in some cases, a high fever, but it does not leave the serious damage that can be caused by measles or rubella when the disease is naturally acquired. After the rash is over, the skin will peel off and return to normal afterwards, so there is nothing to worry about. The phenomenon of a rash appears in individual babies after they have been vaccinated against leprosy, mostly because of adverse reactions to the vaccine. 7-10 days after leprosy vaccination, a measles-like reaction may occur, i.e., a measles-like rash on the skin, which may be accompanied by a low fever, and the rash usually lasts no more than 2 days, so no special treatment is needed. If the body temperature exceeds 38.5°C, you can take antipyretic drugs. However, it should be noted that generally this rash should not have a small white tip, which often indicates that it may be accompanied by infection. Pay proper attention to rest, drink plenty of boiled water, and keep warm to prevent secondary illnesses. In case of severe reactions, take your baby to the hospital for examination in time to avoid serious conditions that may cause other adverse reactions in your baby. There are many reasons why a baby may develop a rash after a leprosy vaccination, either because of an adverse reaction to the vaccine or because the child has developed an allergy. Babies’ resistance is inherently weaker than that of adults, so it is important to pay attention to timely management of problems that arise. Parents should closely observe their children when they find a rash. Since the birth of the baby, it is necessary to start vaccinating various types of vaccines, which are related to the health of the baby, so that the baby is protected from the threat of infectious diseases as much as possible during the growth stage. However, some babies may have some adverse physical symptoms after vaccination, such as low fever and rash. It is still relatively common for babies to have a rash after vaccination. Therefore, mothers must clearly understand the knowledge related to vaccination so that they can respond and deal with it in time.