Sometimes normal and sometimes abnormal leukorrhea is considered to be related to normal follicular development and other physiological conditions as well as pathological conditions such as vaginitis, pelvic inflammatory disease and cervical lesions. 1. Physiological situation: due to the regular growth and development of follicles in women’s ovaries, jelly-like sticky leukorrhea will appear during ovulation and pre-menstrual period due to the change of estrogen and progesterone levels in the body, but it is usually not accompanied by vulvar itching, leukorrhea odor and other clinical symptoms. 2. Pathologic conditions: (1) Vaginitis, pelvic inflammatory disease: if the patient does not pay attention to personal hygiene or low immunity, it is easy to lead to bacteria, mold, trichomonas, mycoplasma and other pathogenic bacteria to multiply and lead to vaginitis, pelvic inflammatory disease, at this time, the woman will have an increase in the amount of leukorrhea, vulvar itching, leukorrhea odor, abdominal pain and other clinical manifestations. (2) Cervical lesions: If the patient’s cervix is localized and combined with human papillomavirus infection, some women will also have leukorrhea increase, vulvar itching, contact bleeding and other discomforts. For women whose leukorrhea is sometimes normal and sometimes abnormal, it is recommended that they go to the gynecology department of a regular hospital if they have vulvar itching and leukorrhea odor at the same time, so that they can complete the examination of leukorrhea and ultrasound, and then be treated under the guidance of the doctor after clarifying the cause of the disease.