The brown discharge again after the abortion is clean may be due to endometritis, pelvic inflammatory disease, incomplete abortion and other reasons. 1. Endometritis: women are weaker after surgery, and if the endometrium is invaded by external pathogenic bacteria, it may lead to endometritis. The main manifestations are lower abdominal pain, increased vaginal discharge and secretion of brown secretion, prolonged menstrual period, and so on. 2. Pelvic inflammatory disease: when women are in the recovery stage, they may be invaded by pathogenic bacteria from the vagina, which enter the uterus, fallopian tubes, ovaries and other reproductive organs through the cervix, or the surrounding organs and cause infections, leading to the occurrence of pelvic inflammatory disease. The main manifestations are pain in the lower abdomen, secretion of brown secretions, fever and other symptoms. 3. Incomplete abortion: If abortion is incomplete after abortion, the pregnancy tissue still exists in the uterus, which will produce continuous bleeding, manifested as brown secretion. If a woman has brown discharge after the abortion is clean, it is recommended that she consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and symptomatic treatment.