The patient has been bleeding a week after the hemorrhoid injection, may be caused by more serious hemorrhoids, hemorrhoidal necrosis and shedding, anal fissure and other reasons. 1. more serious hemorrhoids: when the patient hemorrhoid situation is more serious, and injection treatment hemorrhoids effect is not particularly obvious, may cause bleeding in the anal area, pain and so on. 2. hemorrhoids nucleus necrosis shedding: playing hemorrhoid injection is generally on the hemorrhoid nucleus injection sclerosing agent, such as 5% phenol vegetable oil, 5% cod liver oil acid sodium, etc., so that the hemorrhoid nucleus gradually atrophy and necrosis, after a period of time the hemorrhoid nucleus will be gradually fall off, in the meantime, the anal area may be bleeding, oozing fluid, pain and other situations. 3. anal fissure: when hemorrhoid patients with anal fissure and other diseases, may appear anal pain, constipation and bleeding, especially after defecation force, will aggravate the anal fissure at the bleeding situation. It is recommended that patients seek timely medical examination, clear causes for targeted treatment, pay attention to personal hygiene in life, to keep the perianal area clean and dry, and pay attention to monitoring the condition, once the bleeding is obvious or other adverse reactions, the need to seek timely medical treatment.