Female panties are mainly used to check the character of the secretion, so as to determine whether the secretion is abnormal. 1. Normal female vaginal secretions should be white and pasty, transparent and pulpy during ovulation, and white and sticky after ovulation. The color of the leukorrhea on the underwear is usually white and odorless. 2. If there is a bacterial, trichomonas or mycobacterial infection, resulting in an increase in leukorrhea, the color of the discharge on the panties appears abnormal, or even yellow or yellowish-green, and there is a bad smell. If you find that the color of the discharge on your underwear is abnormal or there is a bad smell, you need to do further gynecological examination and leukorrhea test to confirm the diagnosis, and you need to give medication under the guidance of your doctor.