The main cause of kidney stones is the lack of sufficient water in the urine, leading to minerals forming crystals that stick together to form stones. Other significant causes include a diet high in salt, animal protein, or oxalate, obesity, and certain metabolic or inherited conditions that increase levels of these minerals in the urine. ▪Symptoms ▪Serious, sharp pain in the side and back, below the ribs. ▪Pain that spreads to the lower stomach area and groin. ▪Pain that comes in waves and varies in how intense it feels. ▪Pain or a burning feeling while urinating.