If proctitis is not actively treated, it can cause deterioration, serious damage to the intestine and reduced resistance, which does not exclude continued deterioration to the extent of cancer. It is related to the patient’s age, disease duration, lesion extent, histological features, lesion activity, clinical manifestations and many other aspects, and cannot be generalized. Proctitis is mainly due to long-term recurrent diarrhea, loose stools and persistent abdominal pain caused by bacteria and viruses. As long as reasonable and regular medication is used, proctitis with mild symptoms can be completely cured and will not develop into rectal cancer. However, if tissue biopsy reveals severe atypical hyperplasia, it is possible that cancer will occur within 1-5 years, and the exact time varies from person to person. Therefore, patients with proctitis should not be overly nervous, and active symptomatic supportive treatment is recommended. In addition, patients with proctitis can take dietary regimen on a daily basis, pay attention not to drink alcohol, avoid indigestible and stimulating food, drink more water, pay attention to dietary hygiene, and prevent constipation and diarrhea to reduce the chance of morbidity.