Brown discharge half a month after the abortion surgery may be due to the presence of uterine residue or the presence of uterine infection. Generally, there will be a small amount of bleeding within 7 days after the abortion surgery, which is caused by the blood accumulation in the uterine cavity and the discharge of residual uterine tissue, and it will stop by itself. However, if there is brown discharge half a month after the abortion, it is very likely that the uterus is not contracting well, resulting in the failure to discharge all the residual tissues in the uterine cavity, which will be accompanied by abdominal pain and a feeling of falling, and it is necessary to do an ultrasound examination for confirmation. If the uterus is damaged during the abortion surgery, or the residue has been in the uterine cavity for too long, it will lead to infection of the uterine cavity and symptoms of vaginal bleeding, such as a small amount of bleeding, the blood will turn brown after oxidation. Brown discharge after half a month of abortion surgery is not normal, you need to do timely examination and treatment under the guidance of the doctor.