This sounds like a candida nappy rash although it has been going on for a long time. Give her Nystatin oral solution by mouth 1ml daily for 5 days plus use Nystatin cram after every nappy change for at least 5 days. Also give her Reuteri infant drops 1ml daily for 10 days.If she does not improve after 10 days she should be seen by a paediatric dermatologist.
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