For the causes of one side of the lumbar pain, the following are common clinically: 1, urinary stones or serious urinary tract infection, most of them appear as colic in the lumbar region, the pain is aggravated when knocking, and is accompanied by pain and burning in urination. 2, fasciitis of the lumbar back, lumbar muscle strain, lumbar sprain, small joint disorder, or lumbar disc herniation, can cause one side of the lumbar pain, most of this condition is caused by sedentary, prolonged standing, bending, and the accumulation of strain and strain over time. 3, fracture of the lumbar spine, especially transverse process fracture only occurs on one side, the whole lumbar pain can also be very obvious. 3, fractures of the lumbar spine, especially transverse process fractures occurring only on one side, the entire lumbar pain will also be very obvious, most of this is due to external injuries, such as hitting the corner of a table or car accident, high falls and other situations. Therefore, if you have lumbar pain, you should go to the hospital for examination to clarify the cause before treatment, because for a variety of causes of the formation of lumbar pain, you need to correspond to take different treatment methods.