My daughter (21 months old) has a rash in her groin area. I have been treating it with Hydrocortisone cream but it doesn't seem to be going away. What should I do?

Yes, if the redness is in a crack or skin fold, then using an antifungal like Canesten™ could be a good option, as there may be a risk of it being a fungal infection. It is recommended to apply the cream twice a day for at least 5 days, making sure to cover the affected area and a bit beyond.