The red rash on the face after fever may be caused by toddler’s emergency rash, chicken pox and other factors, which can be treated by general treatment and medication. 1. Childhood emergency rash: this disease is usually caused by human herpes virus infection, the child will have a sudden high fever, after the fever goes down, the skin will appear pimples, may appear on the face. Physical cooling, such as wet compresses, warm water baths, etc., can be used when the effect is unsatisfactory; ibuprofen and other drugs can be used to lower the temperature. 2. Chickenpox: This disease is caused by varicella zoster virus infection, and it will present with fever, and blister-like papules may appear on the face. When the fever is high, you can cool down the temperature by warm water bath, and pay attention to rest; in the early stage, you can use acyclovir and other drugs to treat; when the itching is serious, you can apply glycerite to stop itching; when the secondary infection, you can use neomycin ointment to treat. After the fever face rash can be timely to the hospital, under the guidance of the doctor for related treatment.