Diarrhea with back pain depends on the diarrhea: first, if diarrhea occurs within a short period of time, acute inflammation of the intestines should be excluded. The inflammation caused by improper diet causes intestinal spasm, which causes irritation of the peritoneum and pain in the lower back. Second, if diarrhea is longer accompanied by lumbar pain, it may be colitis or other allergic enteritis, a condition that can also cause lumbar pain. Finally, it is necessary to go to the hospital for examination according to the back pain and diarrhea attacks, and it is better to check the colonoscopy and anti-infection treatment if there is inflammation. According to the condition of the examination, symptomatic treatment should be given. At the same time, it is necessary to exclude lumbago, or other causes of the condition, such as muscle tension, fasciitis, diseases of the lumbar spine, and also to pay attention to the presence of nausea. It is necessary to exclude pelvic inflammatory disease and urinary tract infection, etc. caused by the irritation of the lumbar and gastrointestinal tract.