Hi,
Welcome to the forum. I am really glad to help you out. Vaginal dryness is often due to deficiency of the female hormone estrogen. The common causes of vaginal dryness are Hypothyroidism , Menopause , Sjogren's Syndrome & Vaginitis.
Youâll need to consult a gynecologist and get yourself physically examined as it is not possible to diagnose online. The treatment will depend on the underlying cause. I sincerely hope that helps. Take care.