Hi There What the most likely injury when someone presents with low back pain which causes him to be unable to stand up straight. Bending forward gives him relief. There are no nasty symptoms involving the bladder or the legs.He started experiencing his pain 36 hours after lifting a large heavy box on his own when fatigued. he was largely pain free before that.
Hi, It may be due to some bony or soft tissue injury at spine level. It may be due to injury / spasm of extensor of spine muscle or other soft tissue ; or due to some bony injury with or without nerve involvement which need to be diagnosed (through clinical examination n investigation including X-Ray, MRI) and treated on urgent basis.  So visit orthopedics clinic for further management. Till then strict immobilization through corset belt, cold compression, analgesic (NSAID) , MUSCLE RELAXANT, PPI . And should be transported with LOG ROLLING TECHNIQUE. You may also require steroid course. Hope this ll help Thanks n regards