The first thing to consider is whether a woman is bleeding from her bowel movement (clinically indicated by defecation) is that she is in her menstrual period, and menstrual blood is mixed with it during defecation, which can easily mislead the patient to feel that she is excreting bloody stool. If it is not due to appeal physiological factors, then it may be due to a variety of diseases such as hemorrhoids, anal fissures, rectal polyps, ulcerative colitis, colorectal cancer, etc. Whether it is serious needs to be analyzed according to the specific disease: 1. Hemorrhoids: is a common anorectal disease, clinically divided into internal, external and mixed hemorrhoids. When the patient defecates, the pressure at the anus and rectum rises and the vein wall becomes thin, which easily leads to bleeding. The symptoms can be relieved by adjusting the dietary components and changing the dietary habits. If the symptoms are serious, please consult a doctor in time, and if necessary, surgery can be performed. 2. Anal fissure: When the whole layer of the skin of the anal canal below the dentate line ruptures to form an ulcer, the patient will stimulate the trauma when defecating, which will lead to bleeding, often accompanied by obvious pain, and some patients can have perianal itching. Anal fissures can be treated by medication, diet regulation, etc., to promote wound healing, is generally curable; 3, rectal polyps: is caused by a variety of factors protruding from the surface of the rectal mucosa to the intestinal cavity of the hyperplastic tissue, clinical manifestations of painless blood in the stool, occasionally accompanied by a sense of urgency, polyps prolapse and other symptoms. Rectal polyps should be removed from the hospital in time to avoid cancer and serious consequences; 4, ulcerative colitis: due to genetic inheritance, dietary stimulation, intestinal immune overactivity, resulting in inflammation, swelling, ulceration of the intestinal mucosa, and defecation will appear mucus-purulent stool, can also be accompanied by abdominal pain, fever and other symptoms. Ulcerative colitis cannot be cured, but the symptoms can be relieved by drugs to maintain the efficacy and improve the quality of life; 5, colorectal cancer: rectal cancer and low colorectal cancer invade blood vessels and bleed, which can lead to bleeding in stool, and the amount of bleeding depends on the size of the invaded blood vessels. In addition to defecation bleeding, it can also be accompanied by changes in defecation habits, such as diarrhea, constipation, or alternating between the two. It is recommended to seek timely medical treatment, do finger diagnosis, colonoscopy and other tests, and actively carry out treatment to improve the prognosis.