Kidney1 paroxysm is recommended to go to the hospital for relevant examination to clarify the possible causes: 1, pyelonephritis: when inflammation occurs, it can lead to high pressure in the renal pelvis or inflammatory reaction of the renal pelvis mucosa, which can cause paroxysm pain in the renal region, accompanied by frequent urination, urinary urgency, or accompanied by changes in the temperature, and it is necessary to carry out urinalysis to further clarify the cause. 2, kidney stones: stones lead to fluid in the renal pelvis or to Upper ureteral spasm, which can lead to persistent pain or paroxysmal pain in the kidneys, and further CT or ultrasound examination of the renal region is needed to rule out the presence of stones. 3, hydronephrosis: after a variety of causes of hydronephrosis, it can lead to persistent pain in the kidney area or accompanied by paroxysmal stabbing pain, and the degree of pain and the rapidity of the accumulation of water, the degree of accumulation of water is somewhat related to the acute disease caused by acute diseases, and the pain is also related to the pain in the kidney area. Acute disease caused by acute hydronephrosis, the degree of pain is relatively heavy, while chronic hydronephrosis is manifested as slow dull pain.