Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): About 8 days after the surgery for perianal abscess, I had difficulty in defecating (1~2 small strips), today I defecated three times, now I also pay attention to my diet, eating mainly fruits and vegetables, and yesterday I ate rice that is not dry. I had a perianal abscess surgery in Hangzhou Anal Tai Hospital and found an abscess in my anus. How can I resume defecation? Cui Fenghui, Department of Anorectal Surgery, Zhejiang Tongde Hospital: Difficulty in defecation is very complicated and requires a lot of questions and answers in person and the necessary examinations before you can make a diagnosis of what type it is. We suggest that you come to the hospital for consultation. Patient: What is the general cause of the difficulty in defecation? Cui Fenghui, Department of Anorectal Surgery, Zhejiang Tongde Hospital: 1, general etiology: unreasonable dietary habits, insufficient dietary fiber intake; poor defecation habits; long-term suppression of bowel movement; unreasonable application of laxatives; environmental or defecation position changes; pregnancy; old age, nutritional disorders. 2, colorectal and pelvic floor organic lesions and functional disorders: tumors, outlet obstruction, neuropathy and muscle abnormalities. 3, extracolorectal nerve abnormalities. 4.Spiritual or psychological disorders. 5.Low polyps. 6, drug factors: gastric drugs: aluminum hydroxide, Lizudra; antidiarrheal drugs: Lopamid; anti-hypertensive drugs: nifedipine, verapamil, colistin. 7, endocrine abnormalities and metabolic diseases: such as hypothyroidism or hyperthyroidism, hypokalemia, diabetes mellitus, etc. 8, connective tissue diseases: such as scleroderma, etc.