Hello. Thank you for writing to us I suggest a possibility of a fungal infection/ Tinea cruris. Buttocks and groins are common site for a fungal infection. Sweating, heat and humidity are factors that encourage fungus to proliferate and form itchy, scaly patches. I suggest a wet preparation / KOH examination by scraping a small amount of scale from the surface to look for fungal elements i.e hyphae. If fungal elements are detected I would suggest treatment with topical as well as oral antifungals. Clotrimazole 1% cream is available OTC and you may try it, twice daily for 2 weeks. Oral antifungals e.g fluconazole , terbinafine etc are prescription products and therefore I suggest that you talk to your doctor if the affected area is extensive and does not respond as well as expected to topical antifungals alone e.g clotrimazole cream An OTC oral antihistamine e.g cetrizine 10 mg once daily will provide you symptomatic relief from itching. Regards