Colitis does not necessarily evolve into colon cancer, so there is no specific time criterion. Colitis is an inflammatory disease of the lining of the colon, and according to the type of disease, it can be mainly divided into two categories: acute colitis and chronic colitis. For patients with acute colitis, they can generally be treated by medication and preventive treatment, which can quickly achieve complete cure and no cancer will occur. However, if the patient is not cured and develops into chronic colitis, it may evolve into atypical hyperplasia or even develop into colon cancer if the patient does not receive timely standardized treatment. However, the specific time of cancer transformation needs to be combined with the severity of the patient’s condition to make a comprehensive judgment, and cannot be generalized. Therefore, patients suffering from chronic colitis need to go to the gastroenterology department of the hospital for timely treatment and maintain good living and eating habits. If necessary, regular colonoscopy should be performed.