Severe Back Pain After Big Toe Stubbed After Falling. Disturbed Sleep, Taking Painkillers. Diagnosis?

i have a patient male 57years,butcher,presenting with a history of about 2months back pain worsened 2days after pain started by a fall after he stubbed big toe of left foot.pain worse with standing long,has also had minor episodes of back pain several years earlier,sleep is disturbed,has been taking oct painkillers which increases thirst.has a history of mild hypertension on bendrofluazide(5yrs) renewed every 3months weighs about 14.5 stone and 5ft 10in in height....i m a bit flummoxed with proper diagnosis and contemplating lumbar spondlosis but the bladder factor is puzzling...pls help