Hello,
You should wash the area only when your treating doctor advises. Regarding
treatment, wear cotton undergarments. Application of mild corticosteroid
cream and oral antiinflammatories like ibuprofen/acetaminophen are also helpful.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps.