What should I do if my baby's buttocks are always wet?

Patient's question:

Patient Age: Five and a half months, when having diarrhea, the buttocks are always wet with diarrhea

Doctor's answer:

Analysis of the condition: Hello, based on the child's symptoms, a preliminary analysis and suggestions are as follows:
Treatment suggestions: If you have rapeseed oil, apply a little to the baby's buttocks. It is both safe and effective. If you don't have rapeseed oil, use baby moisturizing oil or olive oil instead. Pay attention to keeping the area clean and dry.