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Hi and thanks for the query.
Itching and dryness of the skin in that region can be due to a fungal infection and sometimes, also due to eczema or dermatitis.
However, since, this area is often covered in clothes, is moist and sweaty too fungal infections are the norm here. I would suggest that you start application of an antifungal and steroid ointment like Lotrimin (clotrimazole and betamethason) over the counter twice a day and keep the area dry and clean while you seek an appointment with your PCP.
Let me know if you have further questions.
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Wish you good health.