The red rash on the baby’s scalp may be caused by folliculitis, eczema, prickly heat and other diseases, and need to take medication for the cause of the disease. 1. Folliculitis: red rash on baby scalp may be caused by folliculitis. For bacterial infection, you can use fusidic acid cream, clindamycin gel and so on. 2. Eczema: red rash on the scalp of infants may also be due to eczema. You can choose to use topical glucocorticosteroids, such as hydrocortisone, dieldrin cream and so on. 3. Prickly heat: red rash on the scalp of infants is also considered to be caused by prickly heat. You can choose to use topical glycerin lotion to relieve the symptoms. Infant medication should be strictly in accordance with the doctor’s instructions, parents should not unauthorized use of medication, in order to avoid damage to the baby’s health.