3. After the baby defecates, it must be cleaned and replaced immediately, washed in time with water or cleaned with a wet tissue, and the baby can also be coated with nappy cream, which is very important to prevent "red buttocks". The main cause of diaper rash is that diapers are not changed frequently, not cleaned or cleaned after defecation, wet buttocks, rough diapers with poor water absorption, or the baby has been using paper diapers because they are not breathable, or are caused by infrequent changes.