My son, who is 9 months old., is having heat rashes in his neck. Initially there were pink small rashes throughout and it turns black later. I took him to pediatrician, he advised to apply candid b liquid. Those few rashes went in a week and again turns up with red rashes turning dried blackish ones. This is d case for more than a month. I took him again to skin doctor, who prescribed for surfaz lotion. Still it remains so. My son basically sweats a lot and still sleeps in cradle. So sweat accumulates in his neck folds. Wat to do now