Regarding the issue of “pain”, I would like to clarify that pain is a subjective psychological feeling to an adverse stimulus. In other words, firstly, some people react strongly to the same stimulus and some people do not, which is related to each person’s pain tolerance; secondly, only the patient can feel the pain, and the doctor cannot experience it, so the patient has the most say in the pain problem. Having clarified the above basic principles, I usually keep communicating with patients repeatedly in my work, asking them about their pain reactions, constantly improving and optimizing surgical methods, approaches and details from all aspects, summarizing a whole set of post-operative pain reduction programs and measures, and forming a series of minimally invasive and minimally painful surgical methods. During the surgery, the patient is under anesthesia and will not feel pain. According to my post-surgery patient survey, after waking up from anesthesia, most patients feel mild pain, which has no effect on their lives; a small number of patients have a slight pain response, but can tolerate it; only a very small number of patients who are extremely sensitive to pain have heavy pain and can be given painkillers to relieve it. Therefore, because people have feelings and fears, it is normal to have mild pain after surgery, but this pain is controllable and tolerable, and patients do not have to worry too much about the pain of surgery. Mild pain is beneficial for patients to take protective measures, and pain-free is not necessarily a good thing. In my daily work, I often encounter my patients who have no pain after I give him minimally invasive surgery and think it is because they are lightly ill or recover quickly, so they go shopping or leave the hospital without permission, which results in anal edema or constipation, bleeding, etc., and the phenomenon of increased pain at a later stage. Therefore, the problem of pain still needs to be viewed dialectically.