Postoperative edema is the swelling and elevation of the trauma margin or retained dermatomal bridge after anorectal surgery, which is a common complication after anal surgery, and is more common after mixed hemorrhoid surgery. Postoperative edema can cause severe pain in the anus, affecting the drainage of the wound, cleaning and dressing change, resulting in delayed wound healing, residual external hemorrhoids after the edema subsides, affecting the efficacy of treatment. Etiology: 1, hemorrhoid preoperative inflammation of the anus did not completely subside; 2, the anus is not strictly disinfected, do not comply with the principle of aseptic operation or postoperative treatment is inappropriate, resulting in incision infection, causing inflammatory edema; 3, hemorrhoidal tissues, especially varicose vein tissues and thrombus stripping is not complete; 4, the incision of the drainage is poor or the suture tension is large; 5, postoperative skin tissues (skin bridges) and other untimely reset or the skin bridge movement is too large 6. Improper anesthesia or injection of drugs. Treatment: 1, oral Chinese medicine, commonly used to relieve pain such as Shen Tang and cool blood and rhubarb soup plus subtractions, such as clearing heat and removing toxins, diuresis, activation of blood circulation and elimination of blood stasis. External compresses and Chinese medicine sitz bath; 2, with 50% magnesium sulfate solution or hypertonic saline wet compresses, can also be used as hemorrhoid cream, ointment, etc. External compresses. Or the use of clearing heat and detoxification, swelling and pain, stopping bleeding and removing blood stasis of traditional Chinese medicine, such as raw rhubarb, manganese nitrate, five times as much as, cypress and other traditional Chinese medicines decoction bath; 3, edema wide range, should be bed rest, such as a large thrombus is not easy to absorb the person, should be cut open as soon as possible to take out the thrombus in order to facilitate the reduction of edema; 4, others, such as the use of low-power laser, infrared light, microwave and other irradiation, spectral therapy and so on, the elimination of hemorrhoidal postoperative edema is also a good effect; 5, Anti-infection treatment. Selection of antibiotics such as norfloxacin, metronidazole and so on.