Low placenta in 13 weeks of pregnancy anal swelling may be caused by the uterus pressing on the rectum, hemorrhoids and other reasons, can be dealt with through activities and dietary adjustments, medication and other ways. Low placenta at 13 weeks of pregnancy will generally cause abdominal distension, not anal distension, there is no treatment for low placenta, can only pay more attention to rest, supplemental nutrition during pregnancy, avoid climbing stairs and do activities that increase abdominal pressure. 13 weeks pregnant anal distension may be the growing uterus, the intestinal compression caused by the pregnant woman’s physical activity is inconvenient, gastrointestinal peristalsis slowed down after the fecal accumulation in the rectal fossa, pregnant women will appear anal distension, this kind of situation is physiological, do not have to special treatment, dietary diet rich in dietary fiber food, such as celery, sweet potatoes and so on may alleviate the symptoms of constipation. 13 weeks pregnant anal swelling may also be the abdominal pressure gradually increased, the anal area of blood vessel pressure enhancement and the emergence of hemorrhoids, local mucosal edema, there will be anal swelling, usually to keep the bowel movement, to reduce the occurrence of constipation, but also follow the doctor’s instructions to use some of the medication to reduce the mucosal edema of the anal area. 13 weeks pregnant placenta low anal swelling if accompanied by bleeding, should promptly seek medical attention.