Lumbar stones are usually kidney stones, and kidney stones are a kind of urolithiasis. Diet should drink more water, reasonable calcium supplement, eat less soy products, eat less food with high oxalate content, and do not drink milk before going to bed. Drinking more water can dilute the urine, the concentration of calcium ions and oxalic acid will be reduced, then the formation of calcium oxalate stones can not. Reasonable calcium supplementation can synthesize insoluble calcium oxalate with vegetables in the stomach and intestines, which can be eliminated from the body with feces. Drink milk before going to bed after sleep, the urine volume decreases, calcium in the kidneys for a short period of time suddenly increased, easy to form stones. Eat less food with high oxalate content, such as tomatoes, spinach, strawberries, chocolate, etc. Excess oxalate will fuse with calcium in the kidneys and form stones. Eat less soy products, the high oxalate content in soy products can fuse with calcium in the kidney and form stones. Kidney stones need to be diagnosed and treated in a hospital under the guidance of a doctor.