Lumbar muscle strain injury mainly manifests as lumbar pain, lumbar discomfort, etc. It usually does not cause abdominal pain, which can be physiological pain or caused by diseases of the digestive system and urinary system. Lumbar muscle strain is mostly caused by prolonged bending, lumbar sprain, improper posture, etc., which leads to soft tissue injuries such as muscles and fascia in the lumbosacral region, causing inflammatory reactions. The common symptom is recurrent lumbar pain, which can be soreness or dull pain, and the pain can be aggravated by exertion and bending. Lumbar muscle strain injury usually does not cause abdominal pain. Abdominal pain may be physiological, such as eating spicy food, or it may be a problem of the digestive system or urinary system, such as peptic ulcer, intestinal obstruction, intestinal tumor, pancreatitis, kidney stones and other diseases. If abdominal pain occurs after lumbar muscle strain, if the symptoms continue without relief, it is recommended to consult a doctor in time and follow the doctor’s instructions.