They are small stones formed in the kidneys from minerals and other substances present in the urine. When concentrated, they cause the minerals to accumulate, building crystals that, when united, generate grit or larger stones that can be extremely painful.
The origin of stones varies, ranging from diet, obesity, and certain health conditions to drugs and supplements. Stones are likely to lodge in various areas of the urinary tract, be it the kidneys, the ureters, or the bladder.
Its expulsion can be very painful, although it can often be achieved by ingesting painkillers and large amounts of water. However, when they are larger, a surgical procedure is required to dissolve or extract them.
When the liquid in the urine decreases, some substances present in the urine begin to crystallize (uric acid, oxalate, phosphate, calcium, and carbonate, among others), causing the formation of stones, whose main component, when analyzed and identified, gives the treating physician important elements to correct your diet and habits to avoid recurrence.