Postoperative bleeding is divided into primary (bleeding within 24h after surgery) and secondary (bleeding after 24h after surgery). Causes: ①Inadequate surgical operation, incomplete anesthesia, poor anal relaxation, inadequate exposure of the surgical area, improper treatment of the bleeding area, and incomplete ligation of the active bleeding point, which can easily cause traumatic bleeding; ②Large surgical wound, poor compression of the dressing, which can cause postoperative traumatic bleeding; ③Vigorous activity or defecation on the same day after surgery can easily cause traumatic bleeding; ④Inadequate ligation of the internal hemorrhoid or detachment of the ligature or ⑤Improper injection of internal hemorrhoid sclerosing agent, too high concentration, too large amount of stabbing, too deep injection site, damage to the muscular vessels; ⑥Patients suffering from hypertension, arteriosclerosis, cirrhosis of the liver and blood disorders, coagulation mechanism disorders, etc. are likely to cause postoperative bleeding. Top prevention: ① Adequate preoperative preparation. Ask a detailed medical history and conduct a comprehensive physical examination. Do psychological care to relieve the patient’s tension. If coagulation disorders and bleeding tendency are found, non-operative treatment should be used first, and surgery should be performed when coagulation function is restored. ② Correct surgical operation. The operation requires clear anatomy, careful operation, and no roughness. ③ Perfect postoperative care. Patients should not defecate within 24 hours after surgery, and keep the stool unobstructed after 24 hours. All kinds of breath-holding and abdominal pressure-increasing actions were strictly prohibited, and strenuous activities were avoided, and the diet was light and easy to digest, and alcohol was not recommended. ④ Intramuscular injection of Carbacrol or intravenous injection of phenolsulfuric acid (hemostatic minerals) or aminolevulinic acid (hemostatic aromatic acid) and other hemostatic drugs. ⑤ Postoperative laxative drugs should be taken to prevent bleeding due to damage to the surgical wound by hard stool. Treatment: ①For postoperative hemorrhagic trauma, you can use gelatin sponge or epinephrine cotton or Yunnan Baiyao to stop the bleeding; ②For primary bleeding, the trauma is blurred, the field of vision is unclear, and it is difficult to suture, the bleeding trauma can be stopped by injecting 1:1 anti-hemorrhoid injection; ③For bleeding internal hemorrhoids with poor ligation or ligature dislodged, the ligature should be reinforced again. The bleeding of necrotic internal hemorrhoids should be found under the anoscope and then the bleeding should be stopped by compression or ligation.