Hard lumps in the anus of pregnant women may be caused by perianal abscess, hemorrhoids, anal canal cancer, etc., which need to be treated according to the cause through medication, maintaining good living habits, surgery and so on. 1. Perianal abscess: a more common situation during pregnancy, generally if it is not big, mild symptoms of the patient, more conservative treatment, can use mupirocin ointment or erythromycin ointment and other topical medications for local treatment, try to avoid taking medication; such as foci of a larger range of things, it is necessary to carry out surgical incision and drainage, and so on, after the delivery of the radical surgical treatment. 2. Hemorrhoids: During pregnancy, the uterus is located just above the blood vessels of the anal veins, which leads to obstruction of blood return causing hemorrhoids and the appearance of anal hard lumps. Patients are advised to maintain good living habits, eat less spicy and stimulating food, and develop the habit of regular defecation, or use potassium permanganate dissolution for sitz bath treatment. 3. Anal canal cancer: anal hard lump is also a common symptom of anal canal cancer, accompanied by thinning of stools, etc. After diagnosis, it is recommended to terminate pregnancy, and need to carry out radical surgery, radiotherapy, chemotherapy and other treatments in time. Pregnant women have special physical condition, so if they have uncomfortable symptoms, they should be examined in time to determine the cause of the disease and treated under the guidance of doctors.