Baby with red rash all over the body can be treated with daily life management and medication according to the cause of the disease. 1. Allergy: When the baby is allergic to dairy products, dust mites, etc., the symptoms of generalized red rash may appear, and anti-allergy drugs can be chosen for treatment, such as loratadine. In daily life, parents should create a clean home environment for babies as far as possible. When adding complementary foods for babies, they should go from one to many, mastering the foods that babies may be allergic to, so as to keep babies away from allergens. 2. Viral infections: herpes virus and other infections, the baby may appear toddler rash, etc., need to take rehydration, oral rehydration salts, ibuprofen control of high body temperature and other methods; such as cough and other complications can be followed by the doctor’s orders to choose cough cough phlegm medication, such as aminoglutethimide, etc. symptomatic treatment. 3. Prickly heat: when wearing impermeable or hot and humid environment, the baby may have prickly heat all over the body. In daily life, choose loose and breathable clothes for the baby, bathe the baby diligently, and create a clean and comfortable living environment for the baby. The above medication should be used in accordance with medical advice. There are many reasons why babies get rashes all over the body, once found, should consult a doctor in time to clarify the cause of the disease and then targeted treatment.