Whether a kidney stone is serious depends on the size, number, location and shape of the kidney stone as well as the complicating symptoms that occur. Most small kidney stones have no uncomfortable symptoms, and are usually found to have urinary crystals or relatively small stones during checkups. Generally, stones less than 0.4 cm in diameter can be discharged with urine on their own, and will not cause significant effects on the body. If the stone is larger, there may be difficulty in expelling it. If the stone is embedded in the urethra, it will cause adverse stimulation to the mucosa of the urethra, resulting in frequent urination, painful urination, urgent urination, and even inability to urinate. Some patients with stones embedded in the ureter will have a certain amount of hydronephrosis, and if the hydronephrosis is serious, it will cause extrusion damage to the kidney tissue, which may lead to renal insufficiency, and some patients may have complications of infection due to urinary stones, which may also have serious consequences. Therefore, once a kidney stone occurs, you should go to the urology department of the hospital in time to have a checkup to clarify the specific situation and then choose the corresponding treatment plan. Generally, stones smaller than 0.6 cm can be treated by oral lithotripsy granules and other drugs, and for stones that are difficult to discharge or are larger, you need to consider extracorporeal shock wave lithotripsy or minimally invasive surgery to remove the stone. The incidence of kidney stones is relatively high and the severity of the manifestation is varied, rarely fatal, but early detection and treatment is necessary to avoid adverse after.