Men should be alert to chronic gastritis, intercostal neuralgia and pancreatic diseases. 1. Chronic gastritis: Chronic gastritis will have the symptom of radiating pain in the lower left rib cage, which may also be accompanied by nausea, vomiting, heartburn and other symptoms. 2. Intercostal neuralgia: pain in one or more innervated areas due to different reasons, therefore, can also lead to symptoms of hidden pain in the lower left rib cage. 3. Pancreatic diseases: chronic acute pancreatitis can lead to pain in the pancreatic area, which can also lead to symptoms of hidden pain in the lower left rib. In addition, malignant tumors and pancreatic abscesses can also cause these symptoms. It is recommended that patients seek medical advice as soon as possible to check the cause of the disease and treat the symptoms under the guidance of the doctor.