Hello. Thanks for writing to us at healthcaremagic
Most likely it is a fungal infection; fungal infections are common at sites such as groin folds because the fungus gets a chance to proliferate in the moist, humid conditions that prevail in the folds, specially in hot and humid weather conditions like tropical countries.
If I was the treating doctor I would have asked you to use a topical cream containing antifungals like either
Sertaconazole Or Luliconazole Or Bifonazole, twice daily for 4-6 weeks.
I normally also ask my patients to take an
oral antifungal because the condition may not respond adequately to just
topical antifungal creams. Oral antifungals like Fluconazole,
Itraconazole are faster acting and therefore rapidly effective in this condition.
An OTC oral antihistamine e.g cetrizine 10 mg once daily will provide you symptomatic relief from itching.
I would suggest that you visit a
dermatologist for a confirmatory diagnosis as well as appropriate prescription.
Regards