Yellowish, sticky, non-painful and non-itchy leukorrhea can suggest a physiological cause of yellowing. For example, when you enter the luteal phase after ovulation, the progesterone hormone is strong and can cause more shedding cells in the vagina, resulting in sticky, yellow or milky color. In this case, you can wash your vulva with warm water or gynecological cleansing, disinfectant and antiseptic lotion to prevent infection, which will usually subside after menstruation and will not affect your health. During the yellowing and thickening period, you should pay attention to your diet as much as possible, do not eat spicy and stimulating food, including alcohol, to avoid the stimulation of these eating habits, which can also cause itching of the leucorrhea and even odor. As far as possible, before and after intercourse, wash the genitals of both parties to avoid cross-infection.