Gastritis usually does not cause low back pain, gastric cancer patients can have hidden pain, distension, burning pain in the upper abdomen, or even acid reflux, heartburn, belching, which is related to diet and attacks before or after meals, but does not cause low back pain. If stomach pain is combined with low back pain, usually consider diseases of both systems. Lumbar pain is caused by lumbar muscle strain, lumbar disc herniation, lumbar spondylolisthesis, tumors, urinary tract infections as well as stones, spinal rheumatoid, lumbar spine tuberculosis and other causes. If you are a woman, you should also consider gynecological diseases, such as acute or chronic pelvic inflammatory disease, dysmenorrhea and so on. There are many causes of low back pain, it is recommended to go to the hospital for examination and timely targeted treatment when necessary.