Mom 59, experiencing constant pain, aching in vagina, no discharge, burning sensation externally, cultures all neg, pH came back acidic. Freq urination?

Vaginal pain. Vulvodynia can be chronic and can last for years in some women, but may also be premenstrual. The degree of severity varies among women. It often occurs in the absence of physical signs or visible abnormalities. It can be severe and can interfere with sexual activity and cause painful intercourse as well as burning with urination. Have her see a gynecologist.