my son is having prickly heat. I have used calamine and abzorb dusting powder and it has reduced in other parts of his body but on his neck folds, the rashes has become like this as shown in pic. he sweats alot and the weather is hot that's why also the neck folds rashes are taking longer to hear. all rashes on his buttocks, back are healed except on neck folds. so I have applied olive oil in this area as someone suggested me. what should I do? any ointment required or? should I put olive oil onlh or like earlier calamine lotion and abzorb powder?? plz suggest