my baby is having this ringworm type rash on her bum since she was 3 months old her doctor prescribed oral antibiotics and candid b cream this rash go away as i apply candid b cream and once i stop applying it comes back at same spot again and again she is having this problem since 4 months now i have also changed many diaper brand thinking it is the cause but it doesn't helped now it also started coming a bit on vaginal lips