Thanks for the query.
I understand your concern.
According to your description the possible causes of your problem are genital infections like fungal or viral, allergic reaction to inner wear or tampons, leukoplakia etc.
By clinical examination and swab from the lesion for culture and sensitivity the possible cause of your problem can be identified and treated.
So, please do consult your doctor and get examined.
Sitz bath may help in decreasing the severity of symptoms and better to avoid tight inner wear.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.