The severity of urinary stones can only be determined by assessing the location, size and number of stones, whether they are causing hydronephrosis, impairment of kidney function and tumors. The severity also depends on whether it is a symptom or a consequence. If the stone is relatively large, greater than 6mm, it may cause hydronephrosis and renal function impairment, the consequences of this situation are more serious. 1, the consequences are not serious: If the stone is located in the ureter and the stone is relatively small, less than 6mm, the symptoms may be more serious, but the consequences are not serious; this situation may be painful and hematuria. The renal colic is often intense in degree and the patient may be in pain to the point of deficiency. Hematuria is visible as red or washed water-like urine in a small number of people, and most people have microscopic hematuria, which is not visible to the naked eye. 2, the consequences are more serious: hydronephrosis and renal insufficiency: chronic obstruction of kidney stones for too long causes hydronephrosis, which will lead to a decline in kidney function, and in severe cases to the degree of uremia. Tumor: The stone itself and the chronic obstruction caused by the stone will stimulate the metastatic epithelial cells for a long time, which can cause squamous epithelial cell metaplasia and even squamous epithelial cell carcinoma, or squamous carcinoma, causing uroepithelial carcinoma and renal malignant tumor. Infection: Urinary tract infection, septic kidney, and infectious shock may be induced when the kidney system is infected. Symptomatically, the stones themselves cause a severe degree of renal colic, which affects the patient’s quality of life. If left unattended for a long time, it may also induce renal insufficiency and tumor, with serious consequences. Therefore, it is necessary to pay attention to the timely diagnosis and treatment of kidney stones.