Vaginal pH can increase around menstruation due to hormone fluctuations and sometimes during intercourse. The causes are not due to poor hygiene and it is not a sexually transmitted infection. Some risk factors include scented soaps, douching, stress and smoking.
Bacterial vaginosis is the most common form of vaginal imbalance affecting as many as 1 in 3 people in the U.S. between the age of 14 to 49. It is often undiagnosed and can have no symptoms. The most common symptoms are abnormal vaginal discharge, itching, or odor.