I have been having lower left sided dull ache back pain on and off for mths it went away for a while and has came back again everyday this week. no urine issues of numbness. should i be concerned?

Inflammation relief: Low back pain is mostly caused by injury to a muscle (strain) or ligament (sprain). Common causes include improper lifting, poor posture, lack of regular exercise, fracture, ruptured disk, or arthritis. You should use alternating hot pads/cold pads, and pain relievers such as acetaminophen for relief. Rest the area for at least 1 week. If symptoms get worse or persist past 2 weeks see a DR.