Hello. Welcome to ask the doctor.
I understand your concern.
The most common reason for irritation vaginal region is fungal infection of skin involving the genitalia.
It may be associated with white curdy foul discharge also. The infection is more likely to get acquired during or after menstrual cycle.
I will advise you to visit your doctor so that he/she can so clinical examination and advise you accordingly.
You can share my opinion with him/her.
I hope it helps.
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.