Hello and welcome to healthcaremagic
I would keep a possibility of
fungal infection. This is because closely apposing body folds e.g thighs and groin, axilla, submammary folds etc can trap sweat, heat and moisture, therefore making the area favorable for fungal proliferation.
If I was the treating doctor I would have asked you to use a
topical antifungal like clotrimazole/sertaconazole/luliconazole cream, twice daily, regularly for 4 weeks.
An
Oral antifungal e.g
fluconazole once weekly for4 -6 weeks OR oral terbinafine once daily for 2-4 weeks OR
Itraconazole 100mg capsule, 2 capsules once daily for a week, is also advisable for a more complete cure
An OTC antihistamine e.g cetrizine 10mg once daily would help you in symptomatic itch relief.
Keeping the folds dry by using an antifungal dusting powder would help in preventing the recurrence.
regards