Hello,
It can be due to allergic reaction or contact dermatitis to your undergarments, sanitary napkins or tampons, soaps etc. There is no change in the colour or smell of discharge in this case. The other possibility is of infection of the vagina. You should wear cotton undergarments. Oral antihistaminics like Benadryl are also helpful but they should be taken after a doctor’s consultation.
I hope it helps. 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. Take care and please do keep me posted on how you are doing.
Sometimes I get itchy too I use vagasil for me it works hope for u too