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Urinary calculi refer to urinary calculi, backache and pain for a few days. Urinary pain may be caused by urinary calculi or other factors.

If the patient's accompanying symptoms are waiting for urination and urine flow is reduced, X-ray examination shows that there are high-density shadows, pure white round or oval particles in the urinary system. At this time, it is generally caused by urinary calculi. After urinary calculi occur, stones occupy the urethra, stimulate the urethra, increase local pressure, cause backache and pain, and generally do not cause urinary pain. If the patient's accompanying symptoms are fever, edema, etc., white blood cells are found in the blood routine examination. At this time, it is generally not urinary calculi, usually caused by nephritis. After nephritis occurs, the patient's kidneys will appear obvious congestion, exudation, etc., stimulating the kidneys, leading to local pressure increase, causing backache and pain.