There is no certain relationship between lumbar sprain and kidney deficiency. Lumbar sprain generally refers to acute contusions of the soft tissues around the waist, such as muscles, tendons, and lumbar fascia. Kidney deficiency is a Chinese medical term, generally considered in Western medicine as renal insufficiency, or impaired kidney function. The main precautions for lumbar sprains are localized lumbar braking and, if necessary, some local cold compresses. Then the usual precautions is to strengthen the functional exercise of the lumbar muscles, can do hip bridge and lumbar reverse arch muscle exercise, strengthen the strength of the lumbar muscles to protect the spine, to avoid some acute injury. The kidney deficiency is generally to see a nephrologist, or Chinese medicine treatment, generally not related to lumbar sprain.