What is the normal pH value of leucorrhea?

The pH value of normal leucorrhea is generally 3.8-4.5, which is slightly acidic. The maintenance of the pH of vaginal secretions is closely related to the effect of probiotics such as Lactobacilli, which helps inhibit the reproduction of pathogenic microorganisms.

The vaginal environment of healthy women is usually in a slightly acidic state, with a pH range between 3.8-4.5. This acidic environment is mainly formed by the decomposition of glycogen in the vaginal epithelial cells to produce lactic acid, and Lactobacillus participates in this process as the dominant flora. Vaginal pH fluctuates slightly with the menstrual cycle, and may temporarily rise to near neutral during ovulation, but still within the physiological range. Daily cleansing of the vulva with water can maintain balance. Excessive washing or the use of alkaline lotions may destroy the microecology. If there is increased discharge, odor, or vulvar itching, you need to be alert to infections such as bacterial vaginosis. Such diseases are often accompanied by alkaline changes in the pH value exceeding 4.5.

It is recommended to choose cotton breathable underwear and change it daily to avoid long-term use of panty liners. Pay attention to cleanliness before and after intercourse, but vaginal lavage is not necessary. If you find that the color of the leucorrhea is abnormal, such as off-white or yellow-green, or accompanied by a burning sensation, you should seek medical attention promptly for routine examination of the leucorrhea, and comprehensively determine the cause through microscopic observation, amine test and pH measurement. Pregnant and postmenopausal women are more susceptible to pH imbalance due to hormonal changes and need to be monitored more closely.