Hi, may I answer your health queries right now ?  Please type your query here...hi i was out drinking with friends last night and i decided to walk home at midnight . on my way home i blacked out and couldnt walk with out holding my lower back it is now causing me real pain is this serouis and rather commom ??
Dear patient Considering your case it seems you have injured your back unknowingly as you were under effect of alcohol. Back pain while walking as you mentioned is very rare. So it might be muscular pain. Still you need to be investigated with X-ray of lumbosacral spine anteroposterior and lateral views to rule out bony abnormalities.  If its normal take tab diclofenac 50\u00a0mg twice a day for pain relief for 5 days, and you will be fine. If X-rays is abnormal take a visit to expert orthopedic surgeon asap. All the best.