Sneezing and coughing always cause me pain when i have a back problem. Im 6'3 with bad posture so it happens a few times a year. I also notice that breathing in doesnt make it hurt...just quick actions like those listed.
"I experience" needs clarification. Is this 0 of the time? Your whole life? Since you tried moving an 800lb pallet without a jack(lol thats what i did). Give us some more info on how long this has been going on and think hard about anything you have done out of the norm recently.
If this is a life long issue go to zee doctor. If it is recent:
Spend time on your back. Put a pillow underneath your knees so they are slightly bent. Ice is good only if you are treating something recent..like hours or a day after. Warmth is good to help relieve the tension in the muscles, but BAD after a recent trauma. If a vertebrae is out, the muscles around it are not having a good time and are very aggravated. Try to only sit in normal hard wood chairs and press your back against it. Dont let yourself slump over.
My Aunt is a chiropractor for a pro baseball team and thats what she told me to do after I started having back pain. So yeah... I have more tips but need more info.