Has anyone had any experience of thrush on babies? my little one has just had cold, stomach bug, and is teething. Her bum is so sore and red, I can only just bear changing her nappy. Doctor (not very helpful) has given me some thrush cream, and advised to put sudocream on it too. I always use sudocream and I am changing her bum (to my pain and hers) more often. Have I done something wrong? How long will it last. I feel horrible!!.