i have a back pain for couple months?what's this?

try some gentle excersising for the back and do some stretching aswell.
don't over do it ,
have some vic or similar stuff rubbed into your back.
see your gp.
oh and next time take short break if your in one place too long , even if it's just going up and down stairs once.

too much sex i reckon . seriously go see your doctor,could be cyattica (don't think i've spelt it properly) or something just as painfull.i get back problems alot, but i put it down to being idle and age ! fair wear and tear as they say.

back as in mid back or to the side of your back?
could be kidneys, kidney stones or so.
maybe suggest a kidney ultrasound to your doctor.

if it is spine related (mid back but radiating out to legs or buttocks or hips) i suggest you go see a chiropractor.
they are wonderfully well educated and thorough.

good luck.

This is serious, my dear. Pls go see a bone specialist as soon. You might have bone hurting your nerve, or a slip-dics or whatever serious. Just go get check. I hope its nothing serious, really.

u may have pulled a muscle..torn a muscle or have slipped ur disc in ur back, but u wont know for sure until u see the doctor. in the meantime i recommend taking ibuprofen for the pain. Maybe apply some deep heat spray too.
Once u have seen the doctor and have found out the cause, it may be worth seeing a chiropracter or osteopath who can manipulate ur back and make it better. hope ur better soon.

You could have slipped your disk. Might just be mild backache though. Go to Dr. and see what he says.