Patients with kidney stones or ureteral stones may experience sudden, severe lower back pain when an acute attack of renal colic occurs. The most common accompanying symptom of a painful attack is hematuria. The hematuria is often watermelon water, tea water, or washed flesh water in color. Sometimes visual hematuria can be seen from the beginning to the end of urination, but most patients present with microscopic hematuria. The cause of hematuria is caused by the stone moving in the kidney or ureter and rubbing the mucosa causing the capillaries under the mucosa to rupture and bleed. Therefore, the presence of hematuria in the naked eye or microscopic hematuria after severe low back pain often indicates the presence of kidney stone or ureteral stone disease. If the stones have a long duration with obstruction, urinary tract infection will often develop, and there may be symptoms such as frequent urination, urgent urination, painful urination, etc. In severe cases, the urine discharged is very turbid, with the color of rice water, which is often accompanied by fever, fear of cold, etc. There are a lot of pus and white blood cells in the urine, and in severe cases, acute pyelonephritis or pus accumulation in the kidney may develop. If not, there is a risk of developing sepsis or sepsis, which may endanger life.