After the abortion surgery, the first menstrual period is over, and brown discharge appears again may be caused by the presence of residue in the uterine cavity, or it may be caused by menstrual disorders and other reasons. 1. The presence of uterine cavity residues: If brown discharge reappears after the end of the first period of abortion surgery, it may be that the abortion surgery has not removed the tissue in the uterine cavity, and the foreign matter in the uterine cavity persists, resulting in persistent vaginal bleeding. 2. Menstrual disorders: The reappearance of brown discharge after the first period of abortion may also be due to the recent psychological stress and excessive mental tension of women, resulting in menstrual disorders. After the abortion surgery, the end of the first period again brown discharge, there may be other reasons, if the patient has other symptoms, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.