Lumbar back strain is a chronic injury to the muscles of the low back, which is common in patients who work long hours bending over to hold objects, or in patients who work long hours in a sedentary position, such as drivers. What are the symptoms of lumbar back strain? First, pain, this pain is often in bending, or sedentary pain is obvious, and this pain is relatively light in the evening when sleeping, and in the morning when waking up, this pain is aggravated. Second, the lumbar activity is limited, when there is lumbar back muscle strain, because of the pain and make the lumbar activity is not good. So lumbar back muscle strain must be taken seriously, when there is pain in the low back, or poor activity, to the hospital, do the relevant examination to exclude organic lesions, may be the lumbar back muscle strain.