What are the symptoms of kidney stones?

If kidney stones occur, patients will usually experience colic in the lower back, especially after exercise, the pain in the lower back will be more severe, and will also be accompanied by hematuria, hydronephrosis, fever and other symptoms.

(1) Lumbar colic: Renal colic is a typical symptom of kidney stones. It usually occurs suddenly after exercise or at night, with severe pain on one side of the lower back. Because the pain is so severe, it is often described as "knife-like". At the same time, there may be pain in the lower abdomen and inner thigh, nausea and vomiting, pale complexion, etc. The patient was restless and in great pain. Renal colic is caused by kidney stones blocking the renal pelvis or ureter during excretion. Many patients experience dull pain and bloating in the lower back. After the pain, some patients may find stones excreted in the urine.

(2) Hematuria: About 80% of stone patients have hematuria. Only a small number of them can see that their urine is red with the naked eye, and most of them can only be detected through urine testing.

(3) Asymptomatic: Many patients accidentally discover kidney stones during physical examinations and do not have any symptoms.

(4) Hydronephrosis: Stones block the renal pelvis and ureters, making urine difficult to discharge and causing hydronephrosis. Some cases of hydronephrosis may not have any symptoms. Long-term hydronephrosis can cause damage to the kidney function on the affected side. Severe bilateral hydronephrosis may lead to uremia.

(5) Fever: Kidney stones can be caused by bacterial infection (infectious stones), or they can induce bacterial infection, leading to fever. Because stones block the excretion of urine, bacteria cannot be excreted in time, which can lead to sepsis and endanger life in severe cases.