Your infection likely keeps returning because one of your creams contains a strong steroid. Steroids quickly relieve itching but weaken the skin's defense, allowing the fungus to grow back stronger when you stop. To cure this permanently, you must stop using steroid-containing creams. A doctor will likely prescribe oral antifungal tablets, such as itraconazole or terbinafine, alongside a pure topical antifungal cream like luliconazole or clotrimazole. You must continue this treatment for the entire prescribed duration, even if the skin looks clear. Additionally, keep the affected area clean and dry, and avoid sharing towels.