What causes milky white vaginal discharge?

In women, milky-white vaginal discharge is generally considered normal if it is odorless and not accompanied by external genital itching. This type of discharge commonly occurs after ovulation ends, due to estrogen-induced shedding of cervical mucus-producing cells, which then mix with vaginal epithelial cells to form milky-white discharge. Similarly, during pregnancy, elevated levels of estrogen, progesterone, and human chorionic gonadotropin (hCG) can also cause such milky-white discharge.

However, if this milky-white discharge increases in volume or develops an odor, it may indicate vaginal dysbiosis (an imbalance in the vaginal microbiota). In such cases, special attention should be paid to personal hygiene, sleep-wake cycle regulation, and immune system enhancement. Once the normal vaginal flora—particularly Lactobacillus—reestablishes dominance, these symptoms typically resolve spontaneously.

If the discharge is malodorous and associated with external genital itching, vaginal inflammation should be suspected as the underlying cause. In such instances, a visit to the hospital for routine vaginal discharge testing is recommended to determine the specific type of infection. Subsequently, the physician will prescribe targeted treatment based on the confirmed diagnosis.