If you had an allergy to something you could have swelling in the back of your throat, which makes it really hard to swallow. It really hurts and it could kill you from restricted breathing.
sore throat? Maybe you need your tonsoles removed. A sore throat can be symptomatic of a variety of conditions. I recommend consulting with your health care provider if the problem persists.
you can jump and land the wrong way, fall of something high, try to crack your back but then dislocate it, some dude could hit you from behind with a steel chair to the spine, etc.
Usually the cause is a bed that does not provide enough support. It will take a while for the problem to develop so it may not be easy to link this to the bed. for instance after a month of sleeping...
