When a baby develops goose bumps after having a fever, it is very likely that a rash disease has occurred, including chicken pox, measles or hand, foot and mouth disease, and it is time to go to the hospital so that the doctor can check the goose bumps and diagnose the type of infection. Most rash diseases are caused by viral infections, which not only cause fever, but also other accompanying symptoms, such as measles with some respiratory infections, which need to be treated according to the specific symptoms of the baby. Antiviral treatment is generally not needed. For fever, if the temperature is higher than 38.5 degrees, oral ibuprofen suspension is needed to reduce fever. For the case of pimples, if accompanied by itching, you can apply topical glycerine lotion, which can effectively relieve the itching.