The abdominal pain of colitis is generally localized in the lower left abdomen and is accompanied by stool that is mucous or purulent bloody in nature. Sometimes, there is urgency followed by incomplete relief, and there may also be alternating occurrences of diarrhea and constipation. The diagnosis of colitis requires a colonoscopy, during which congestion, edema, and erosion of the colon can be observed, and in severe cases, ulcer formation can be seen. In terms of treatment, colitis firstly requires the use of medications to regulate the intestinal flora, such as Bacillus cereus, Bifidobacterium triple viable bacteria, etc. Additionally, anti-inflammatory treatments such as mesalazine are used. (Specific medications should be administered under the guidance of a doctor.)