The main reason for the white powder on the panties is the following: first, semen is stored in the panties during intercourse, and white powder material will appear when the semen is dry. Second, consider gynecological inflammation, if the problem of gynecological inflammation after the vaginal discharge increases, the leucorrhea appears abnormal, will appear white powdered leucorrhea, belongs to the vaginal infection and the performance of special symptoms, consider mycobacterial vaginitis, it is recommended to timely diagnosis, treatment. Thirdly, it is considered normal vaginal discharge, usually vaginal discharge is more, long-term do not pay attention to personal hygiene, do not clean the pubic area will also appear, it is best to go to the hospital to diagnose and confirm the diagnosis of the disease, and then carry out treatment.