I totally understand how worrying it is when the rash keeps coming back even after treatment, because we went through something similar with my son when he was around that age and it was so stressful watching it flare up again and again. The fact that it improves with the cream but returns could mean there is an underlying trigger, like an allergy or eczema, that the cream alone is not fully addressing. I would bring your LO back to see the PD again and let them know the rash keeps recurring, so they can have a proper look and maybe investigate further. It is always better to get it checked again rather than just continuing with the same cream if it is not giving a lasting result. Hope your little one feels better soon, hang in there mummy.