Fungal infections on the upper leg usually respond well to antifungal creams such as clotrimazole, terbinafine, or luliconazole when used regularly for a few weeks. Keeping the area clean and dry, wearing loose clothing, and avoiding sweating can help speed up healing. It is important to avoid steroid-containing creams, as they can worsen the infection and delay recovery. If the rash spreads, becomes more itchy, or does not improve, you should consult a doctor for stronger treatment, including oral medicines if needed.