Thanks for all these additional information.
I understand your concern.
Well as you describe, possible causes may include Eczema.
Now I would recommend some self-care measures like
Take a cool water bath with Potassium permanganate(an oxidizing agent ).
The concentration of KMnO4 solution sitz bath is usually 1:10000
(i.e. one teaspoon of the solution is diluted with water to 2 Liters).
And afterward, apply OTC 1% hydrocortisone cream mixed with bacitracin ointment twice a day.
Clean the area with DIAL soap and use OTC Abzorb powder afterward.
And keep the area dry and clean.
Wear loose-fitting cotton clothes to prevent friction.
Take OTC Motrin and Claritin for few days.
If your symptoms will persist then see a dermatologist for further evaluation and management.
Let me know if you have any further query so we can discuss it thoroughly in every aspect.
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