Sigmoiditis is primarily characterized by abdominal pain and bloating. The abdominal pain often subsides after bowel movements, and patients may experience diarrhea, constipation, or alternating episodes of both. Diarrhea may present as loose stools, mucous stools, or poorly formed stools. The stool surface may have mucous streaks or blood, accompanied by dull pain or discomfort in the lower left abdomen. Diagnosis can be confirmed through colonoscopy and stool routine tests. The onset of sigmoiditis is closely related to daily lifestyle and dietary habits. Patients with sigmoiditis should maintain a light diet, consuming easily digestible foods and avoiding spicy or irritating foods, as these can irritate the intestinal mucosa and worsen the condition. Patients should pay attention to keeping the abdomen warm and can use heat therapy, such as warm compresses and manual massage, to alleviate symptoms. Establishing a regular routine and correcting bad habits like staying up late and excessive alcohol consumption are beneficial for recovery.