Hello. Thanks for writing to us at healthcaremagic Itchy patches in upper inner thighs are most likely due to fungal infection of the groin folds. The anatomy of groin folds is such that sweat and moisture gets trapped between the folds; this provides an adequate environment for the fungus to proliferate and form itchy patches specially in hot and humid weather. I suggest you to apply an OTC topical antifungal e.g clotrimazole 1% cream, twice daily for 2-4 weeks. An OTC oral antihistamine e,g cetrizine 10 mg once daily will provide you symptomatic relief from itching. You may visit a dermatologist for a confirmatory diagnosis. Your treating dermatologist might also start you on oral antifungals e.g fluconazole, if the infection is extensive. Regards