In recent years, with the rapid development of anorectal surgery technology and the popularization of the concept of painless and minimally invasive, the pain level of anorectal patients after surgery has been greatly reduced. Most patients feel only slight pain on the day after surgery, and after the second day after surgery, they usually do not feel too much pain, except for temporary pain in changing medicine and defecation. However, there are individual differences in the sensitivity to pain. For example, elderly people are not sensitive to pain due to the decline of various body functions. However, there are individuals who are very sensitive to pain because of their low pain threshold. In the face of pain, many patients prefer to persist and endure rather than receive painkillers. This idea of rejecting the use of painkillers is because many people believe that: painkillers have no benefits except pain relief. Although any drug has side effects, the side effects of painkillers are often magnified by patients’ one-sided perceptions. Many people believe that the application of painkillers may produce side effects such as dependence, addiction and affect wound healing. In fact, whether a drug is addictive or not is related to the nature of the drug itself and the length of time it is used. Generally long-term application of large amounts of certain painkillers may result in drug addiction. The addictive properties of commonly used painkillers are very low, and the possibility of addiction is basically unlikely because they are generally used temporarily in small doses after anal surgery. Even with long-term application, according to international research statistics, the correct use of analgesics does not increase the probability of addiction. Similarly, it is only if applied in large quantities over a long period of time that it may lead to delayed wound healing, and small temporary applications in analgesia do not lead to delayed wound healing. If pain medication is indeed needed and not used consistently, it can instead lead to a range of complications. Complications due to pain in anorectal medicine and their causes are as follows: 1. Pain leading to urinary retention: The closely connected relationship of the perineal nerves. Due to the influence of anesthetics after anorectal surgery plus the local pain and discomfort in the anus, it can cause spasm of the urethral sphincter, leading to the occurrence of urinary retention, which must be catheterized if necessary. The catheterization is an invasive operation, not only sore and uncomfortable, but also prone to urinary tract infection, so that the loss is not worth the gain. 2, pain leads to fecal impaction: the pain of the anus, resulting in the patient’s fear of defecation. Patients often interrupt defecation due to pain, after the pain, valuable bowel movements have disappeared without a trace. Repeatedly, a large amount of feces collects in the rectal potbelly. Not only does the pain increase, but the patient also experiences a sensation of falling that is more unpleasant than the pain, and this sensation is not helped by the use of painkillers. Pain – fecal impaction – anal drop – urinary retention, forming a vicious circle. This back-and-forth makes it difficult for people to sit and lie down. 3, pain leads to delayed healing: pain can lead to spasm of the anal sphincter. The anal sphincter belongs to the autonomic innervation, not a muscle that you can control if you have strong will power and want to control. Repeated and continuous anal sphincter spasm will lead to poor drainage and blood microcirculation in the anal local wound and insufficient blood supply. Wound ischemia and hypoxia, granulation edema pale not bright red, resulting in delayed healing. 4, pain leads to decreased immunity: pain will also affect the endocrine and immune function of the body, easy to complicate the same respiratory tract infection, which also affects the incision healing a reason. 5, pain leads to thrombosis of the lower limbs: because of the fear of pain, patients are reluctant to move around and stay in bed all day, the skeletal muscles do not get proper activities, which not only delays the recovery of the body after surgery, but also may cause deep vein thrombosis, leading to serious complications such as pulmonary embolism. 6, pain leads to gastrointestinal peristalsis: general anorectal surgery day, anesthesia drug effect dissipated, you can get out of bed, pain restricts the patient’s activities, the patient does not want to get out of bed, too much bed, so that the gastrointestinal tract peristalsis reduced, and lead to constipation, loss of appetite, nutrition can not keep up. 7, pain leads to psychological changes: pain can also cause a series of psychological and behavioral changes, such as insomnia, anxiety, fear, depression, sensitivity, frustration, depression. In conclusion, the application of analgesics after anorectal surgery, when necessary, is more beneficial than harmful. Not only is the postoperative use of analgesics not addictive and does not affect the healing of the incision, but it increases immune function by improving blood circulation and promotes early activity, which in turn accelerates the healing of surgical wounds. If one is stubborn and refuses to apply painkillers and endures pain, one will lose more than one gains.