This number is your vaginal pH. A pH of 4.5 with the symptoms of itching, burning, unusual odor or discharge may be a yeast infection. A pH of 5.0 -7.5 may indicate you have a different kind of vaginal infection. The chart below can be helpful. It is not for diagnosis since infections vary in the way they manifest, but it may be helpful when discussing your symptoms and pH with your doctor. Much like other parts of the body, a woman’s vagina has a pH. A healthy vagina is slightly acidic, with a pH usually in the range of 3.5 to 4.5. A normal vaginal pH measures 4.5 with this kit. The acidity of the vagina helps control bacteria and prevents the infection-causing types of bacteria that like a high pH from overgrowing. When vaginal pH is above its normal range, it may indicate a bacterial infection. There usually are symptoms with an infection. The Vagisil Screening Kit® is intended for use by women who have itching, burning, unpleasant odor or unusual discharge. It does not identify specific causes or types of infections. Only your doctor can do that.