Rashes on children’s bodies after fever have the causes of toddler’s emergency rash, rubella, scarlet fever, etc. Sometimes they can get better on their own, and sometimes they need to be treated with penicillin and other antibiotic drugs. 1.toddler emergency rash: caused by viral infection, usually fever 3~5 days after the rash, the rash can be cured by itself, if there is no special, do not need to be treated. 2. Rubella: also caused by viral infection, generally mild symptoms, fever 1~2 days after the rash, without special treatment can be cured. 3. Scarlet fever: caused by streptococcal infection, the highest temperature when the rash appears, the systemic symptoms are obvious, the red rash on the body, the pressure of the discoloration, the tongue is prune tongue, need to use penicillin or erythromycin for treatment. When found that the child fever rash need to go to the hospital in time, under the guidance of the doctor to determine the cause of the rash, and the appropriate treatment. Antibiotics should be used under the guidance of a doctor to prevent allergic reactions. Pay attention to skin care.