A positive Gardnerella vaginalis 3+ suggests that the organism is suffering from bacterial vaginosis, which is usually caused by poor hygiene and other reasons that alter the vaginal flora. Gardnerella vaginalis is a normal parasite in the female vagina, which is a conditionally pathogenic bacterium. Lactobacillus bacteria predominate in the normal female vagina and maintain a dynamic balance with other microorganisms such as Gardnerella vaginalis, while poor vaginal hygiene, frequent vaginal douching, etc., can easily lead to changes in the vaginal pH environment and bacterial flora, resulting in an increase in Gardnerella vaginalis. When the Gardnerella increase appears positive 3+, it can cause women to have increased vaginal discharge with fishy odor, which needs to be actively treated under doctor’s guidance.