If the bleeding increases on the 13th day of the abortion surgery, it can be treated with antibiotics if it is caused by the infection of the uterine cavity, and if it is caused by the residue of the uterine cavity, it should be cleansed in time. 1. uterine cavity infection: abortion surgery will have a greater impact on the female uterine cavity, if the surgery is not properly operated or poor recovery, the body may have uterine cavity infection, should take cefradine capsules, metronidazole tablets and other drugs to intervene, this kind of drug may make the body dizziness, nausea, and other adverse reactions, allergic to the components of the drug or severe liver insufficiency is prohibited. 2. Uterine cavity residue: abortion surgery 13 days of increased bleeding may also be related to surgical residue, in the uterine cavity when the residue will be more large stimulus, should be carried out in a timely manner to clear the uterus to intervene in the surgery. If there is an increase in bleeding on the 13th day of the abortion surgery, it is recommended to consult a doctor in a timely manner, with the help of the doctor to clarify the cause of the disease, and targeted treatment or treatment, not unauthorized use of medication.