my son is 1 year 5 month old. rashes on his neck is spreading. also I've been applying lotion 10 days which is doctor recommended. and rashes is not cured

A. Try to keep this area dry which is what is going to be important sometimes when there is too much of sweat this kind of a problem can appear to try to keep keep it dry try to keep your child into a proper room temperature with the fan or cooler is on where your child is having not much of a sweat