When diarrhea is followed by symptoms of lumbar pain, it may be caused by factors such as inflammation of the gastrointestinal tract and electrolyte disturbance. If the diarrhea is caused by pain in the lower back, it is commonly associated with diseases such as lumbar disc herniation. In addition, it is also necessary to consider urinary stones, unclean diet, and wind and cold in the lumbar region, resulting in the simultaneous presence of diarrhea and lumbar pain. 1. unclean diet and cold in the lumbar region: such as the consumption of cold, spicy and other stimulating foods, such as popsicles and chili peppers, can stimulate the mucous membrane of the stomach and trigger diarrhea symptoms. At the same time, if the patient’s waist is cold, it can cause pain in the waist. It is recommended to have a light diet and pay attention to keeping the lumbar area warm. If the symptoms are serious, medication can be used as prescribed by the doctor for treatment; 2. Electrolyte disorders: If diarrhea is prolonged, it can lead to a large loss of tissue fluid in the body, which can cause discomfort such as lumbar pain. Patients can be treated with rehydration under the guidance of professional doctors to balance water and electrolytes in the body to relieve the symptoms; 3. Intestinal inflammation: intestinal diseases such as colitis, due to the upward movement or spread of inflammatory substances, resulting in infection of the outer intestinal tract and diarrhea, may also cause symptoms of back pain. Patients need to go to the hospital for routine blood tests, stool routine and other tests to clarify the causative organisms, and then use anti-inflammatory drugs for treatment or apply sedative and anti-diarrheal treatment under the advice of a professional doctor; 4. Lumbar disc herniation: pain can be produced by stimulation of the lumbar nerves, mainly in the form of radiating pain. If the nerve then stimulates the posterior peritoneum, it causes spasm of gastrointestinal muscles and accelerates gastrointestinal peristalsis, leading to diarrhea. If the pain cannot be relieved, you can take oral ibuprofen and other drugs as prescribed by the doctor, and combine with antimicrobial drugs such as cefixime, gentamicin, and ofloxacin to relieve diarrhea symptoms; 5. urinary stones: pain in the lower back and diarrhea can also occur during stone attacks, and the diagnosis can be clarified by ultrasound examination. After the diagnosis, according to the cause, take drugs and surgical treatment to remove the stones, and usually need to ensure sufficient water intake to relieve the symptoms.