Hidden pain in the left lateral lumbar lower ribs may be caused by costochondritis, localized fasciitis, gastroduodenal diseases and other reasons. 1. Costal chondritis: due to the inflammatory reaction of the ribs to stimulate the intercostal nerves, the patient may have vague pain inside the ribs of the left lateral lower back. 2. Local fasciitis: due to local friction, strain and other factors cause local fascia aseptic inflammation, the patient may feel left lateral waist inside the lower ribs hidden pain. 3. Gastroduodenal diseases: such as chronic gastritis, gastric ulcer, duodenal ulcer, etc., the patient may appear left lateral lumbar lower ribs inside hidden pain. There may be other reasons for the pain in the left lateral lower back ribs, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.