The common causes of left kidney pain include left kidney obstructive pain, left kidney trauma, left kidney infection, left kidney stenosis and so on. 1. Left kidney obstructive pain: such as left kidney or ureteral stones, tumors and other formation of obstruction, resulting in a burst of pain in the left kidney, and in the later stage of the seriousness of the paroxysmal colic. 2. Left kidney trauma: trauma to the left kidney caused by car accident, renal contusion or rupture of renal cysts and other causes of renal blood accumulation, increased tension in the renal region, which can also cause a burst of pain in the left kidney. 3. Left kidney infection: left kidney tuberculosis, left kidney abscess, left kidney pus accumulation, etc. can also cause left kidney pain, accompanied by dull pain and fever in the kidney area. 4. Left renal vascular stenosis: such as left renal artery spasm, left renal arteriosclerosis and so on lead to left renal vascular stenosis, can also cause left kidney pain for a while, and in serious cases, there will be renal infarction, which will be more severe pain. Therefore, there are more reasons for left kidney pain, patients should consult a doctor in time to clarify the cause of the disease, and early treatment under the guidance of physicians.