Kidney stones are common and frequent in the urinary system, with more incidences in men than women, mostly in young adults, and no significant difference in incidence between the left and right sides. The kidney is the main site of stone formation in the urinary system, and stones from any other parts can originate in the kidney. Ureteral stones almost always come from the kidney, and kidney stones are more likely to directly damage the kidney than stones from any other parts, so early diagnosis and treatment are very important. It is important to prevent kidney stones, here is how to prevent kidney stones. 1, diet prevention: urinary stones are common diseases of the urinary system, including kidney stones, ureteral stones, urethral stones and bladder stones. Kidney stones are chemicals composed of calcium oxalate that can cause renal colic. Currently, doctors recommend reducing calcium intake in the diet to prevent recurrence of kidney stones. The diet structure is adjusted according to the composition of the stones to determine the diet for stone prevention. (1) Adopt a high-fiber diet. It is generally considered best for patients with kidney stones to eat less salt and animal protein and insist on drinking plenty of water to keep the urine volume at 2,000-3,000 ml/day, which not only plays a role in preventing the recurrence of kidney stones, but also ensures calcium intake, which is good for all other aspects of the body. (2) Adopt low calcium and low phosphorus diet for phosphate stones, and avoid high calcium, high salt, high oxalic acid, high animal protein, high animal fat and high sugar diet for calcium-containing kidney stones. (3) A low purine diet should be adopted for uric acid stones and a low methionine diet for cystic acid stones. Fruits and vegetables can make the urine turn alkaline, which is better for preventing uric acid and cystine stones, and meat food makes the urine acidic, which is better for preventing infection stones. 2, drink lemon juice to prevent kidney stones: as a beauty fruit in life, lemon is getting more and more attention from fashionable women. Lemon is rich in citric acid, known as the “citric acid warehouse”. The most important nutrients are calcium, phosphorus, iron, vitamin B1, vitamin B2, vitamin C and niacin, in addition to sugar. In fact, lemon itself is a fruit with high nutritional and medicinal value. Regular consumption of drinks containing lemon juice can also prevent kidney stones. Researchers at the University of Wisconsin said that a study of more than 100 cases found that regular consumption of lemon water or the addition of lemons to water during the week is conducive to the production of citrate in the urine, a chemical that prevents the formation of crystals of minerals in the urine in the kidneys, also known as kidney stones. In addition, drinking lemon water can also relieve pain during urination when stones reach a certain level in the body and pain occurs when the stones pass through the narrow urethra. You can choose dried lemon slices and drink two or three slices each time as tea, or cut the lemon into thin slices and soak in water. It is best to use warm water when soaking, as this will preserve more of the nutrients in the lemon. You can also put lemon slices in black tea and drinks. As the lemon ph value is as low as 2.5, it is best not to drink lemon water for people with excessive stomach acidity, stomach ulcers, and other gastrointestinal diseases. 3, drink more water: this is absolutely very important. Drink more water, at least 2000~3000ml of water daily, in addition to drinking a lot of water during the day, you also need to drink 500ml of water before going to bed, and 200ml of water after getting up to urinate during sleep.