For patients with mild symptoms and intermittent episodes that do not affect their quality of life, dietary and lifestyle modifications are first recommended. If this is not effective, then medication and psychotherapy should be given to relieve symptoms. 1. Adjustment of diet and lifestyle: Avoiding overeating, drinking alcohol, and avoiding high-fat diets such as eating cakes can reduce the symptoms of irritable bowel syndrome. 2. Medication: For patients with diarrhea, antidiarrheal drugs such as montelukast can be the first choice of treatment. For persistent diarrhea despite the use of antidiarrheal medications, the bile acid chelator colesevelam can be used, and for particularly severe diarrhea, alosetron can be tried. For patients with constipation, it is recommended to try polyethylene glycol; if this is not effective and persistent constipation persists, linaclotide and rubiproliferin can be given. For patients with abdominal pain and bloating, antispasmodic drugs can be taken, commonly used drugs: mebeverine, pivoxyl bromide, dicyclomine and scopolamine. 3. Psychotherapy: psychosomatic factors may cause irritable bowel syndrome. Cognitive-behavioral therapy, hypnotherapy, meditation therapy and biofeedback therapy may be helpful in relieving the symptoms of irritable bowel syndrome. The use of medications should be under the direction of a physician.