Hello
I appreciate your concern
Looking at your description this could be a sign of underlying Infection,
allergy or drying effect or contact dermatitis
I would like further information to help you better like
Your age and relevant medical history like
diabetes or other metabolic disease
Any recent exposure to unprotected sex?
I would advise you to consult a VD specialist for physical check up and a battery of tests for confirmation of diagnosis
You may require a course or antibiotics or antifungal drugs
Meanwhile use condom during sex
Maintain good hygiene
Apply any moisturising or antiseptic ointment like mupirocin
Hope this answers your question
Beat wishes