Conservative treatment of rectal cancer: Many patients are reluctant to undergo surgery because of the fear of surgery, so can rectal cancer be treated conservatively? It has become a common concern for rectal cancer patients and their families, here we explain the conservative treatment of rectal cancer. Chemotherapy is applicable to patients with adjuvant treatment before and after surgery or inoperable; chemotherapy is applicable to patients with adjuvant treatment before and after surgery or inoperable; rectal cancer is mostly adenocarcinoma, and more sensitive drugs such as 5-FU, mitomycin, adriamycin, carboplatin, metacyclic nitrosoureas are often used, and the combined application of several drugs is more effective. Radiotherapy is used for inoperable advanced cancer or preoperative irradiation or postoperative irradiation: 1.inoperable rectal cancer: radiotherapy can transform the original inoperable into operable, and most of them can achieve the purpose of symptom relief, especially better analgesic effect. 2.Pre-operative irradiation: The purpose is to shrink the tumor, improve the surgical resection rate; reduce and eliminate lymph node metastasis, reduce the chance of local recurrence, reduce the hematological metastasis caused by surgical operation, and improve the long-term efficacy. 3.Postoperative irradiation: It can reduce the local recurrence rate and improve the survival rate. It is suitable for those with incomplete surgical resection; postoperative confirmed Dukes B or C stage cases; cases in the lower 2/3 of the rectum. Chinese medicine treatment is used to improve the general condition and enhance resistance to disease: According to the principle of dialectic and dialectic, it is used to improve the general condition and enhance resistance to disease, and its side effects can be reduced when applied in conjunction with chemotherapy and radiotherapy. In the early stage, the main treatment is to attack, and the first attack is followed by supplementation or both attack and supplementation, with the treatment of clearing heat, detoxifying swelling and dispersing blood stasis, which can be used in the treatment of the snake’s tongue with white flower, half lotus, yellow herb seeds, trigon, etc. In the middle stage, the first supplementation is followed by attack, and the main treatment should be to support the righteousness, taking into account the removal of evil, which can be used in the form of si wu tang, raw pulse san, and tonic zhong yi qi tang, etc. In the late stage, the main treatment is to supplement, and the main treatment is to support the righteousness, so that the evil can be removed first. For Qi deficiency, use Si Wei Tang or Tonifying Zhong Yi Qi Tang. For blood deficiency, use Si Wu Tang with Shou Wu and Aconite. Qi and blood deficiency, with eight cherished wolfberry, maitong, etc. Cryotherapy can reduce the bleeding and pain of rectal cancer: Calan was the first to use liquid nitrogen to freeze rectal cancer in 1965 and proved that freezing can reduce the bleeding and pain of rectal cancer without adverse complications; Langer reported 86 cases in 1977 and 16 cases survived for 3 years after freezing; Schunpelik reported 189 cases in 1989 and the 2-year and 3-year survival rates were 32.8% and 4.9%, respectively. Gu Baoqing of the Fourth Military Medical University performed cryotherapy for rectal cancer that was not suitable for surgery and did not receive surgery, and reported 89 cases in the radical cryotherapy group in 1989, with 3-year and 5-year survival rates of 51% and 38.8%, respectively; 165 cases in the palliative cryotherapy group, with a 3-year survival rate of 14.3%. Therefore, cryopreservation of rectal cancer can achieve clinical cure for early and mid-stage cases, i.e., symptoms and cancer disappears quickly and there are no cancer cells in biopsy. Cryopreservation of advanced rectal cancer has good palliative effects, reduced bleeding, pain relief, obstruction relief and life extension effects. Laser treatment is applicable to low rectal cancer which is too old and frail or has internal diseases that cannot be operated or unwilling to be operated: It is applicable to low rectal cancer which is too old and frail or has internal diseases that cannot be operated or unwilling to be operated, treated by Nd-YAG laser or CO2 laser, which can directly vaporize, coagulate and repeatedly treat the tumor, once in 5~7 days, which can fully open up the cancerous stenosis, favorably relieve the obstructive symptoms and have good palliative treatment effect. For early rectal cancer, laser can be used to vaporize and cut, and it is necessary to pay attention that the irradiation time should not be too long and the laser penetration should not be too deep to avoid intestinal perforation. In conclusion, there are many conservative treatment methods for rectal cancer, and you should choose the appropriate treatment methods according to different conditions, pay attention to listen to experts’ advice, and don’t just stick to your own ideas!