Baby redness in the private part of the rash may be diaper dermatitis, pediatric eczema, prickly heat and other diseases caused by the need to take general measures for the cause of the disease, drug treatment. 1. Diaper dermatitis: the main manifestation of the diaper contact area will appear pimples, erythema and other symptoms. Children need to change diapers regularly and keep the skin dry. Parents need to apply zinc oxide and other oily ointment under the guidance of the doctor. 2. Pediatric eczema: common symptoms include erythema, itching, blisters, etc., which can be manifested as redness and rashes in the baby’s private parts. Children need to wear cotton, loose clothing, each time after bathing appropriate use of lotion. If necessary, the child can follow the doctor’s instructions to take loratadine, cetirizine and other antihistamines, as well as glucocorticosteroids such as Denadyl cream. Also need to be under the guidance of the doctor to the child external use of glycerine lotion and other drugs. 3. Prickly heat: generally manifested as the presence of small blisters, erythema, tingling, itching and so on at the skin lesions. Parents can use a wet cloth to apply ice to the lesion area, which is helpful to alleviate the clinical symptoms. Children need to follow the doctor’s instructions for external use of glycerine lotion and other drugs. There are many causes of redness and rashes in the private parts of babies, and it is necessary to go to the hospital to clarify the specific cause of the disease and actively treat the primary disease. All of the above drugs should be used under the guidance of a doctor, avoid self-medication.