My Daughter Has Spot On Her Face That Raises Into

my daughter has spot on her face that raises into a lump and fills with pus and it stinks,she went to the dermatologist and they put an injection in the spot.my daughter felt it helped but didn't totally get rid of it,my daughter felt one more injection would have helped, but the doctorjust told her to put warm compresses,my daughter has been dealing with this for over a year.what should she do