The super-tech arch wires that we usually get at the beginning of treatment — this was my case — are heat-sensitive.  So when they are in our mouths and heating up to body-temperature, they exert more pressure on the brackets.  And this is what moves our teeth.

And causes PAIN!

So, one way to give yourself relief, especially with new braces–albeit fleeting–is to put cool or cold liquid in your mouth.  That will “relax” the wire.  Of course, this only works with the heat-sensitive wires.

So, give it a try.  You don’t even have to drink the liquid.  Ice cream or frozen yogurt would work, too.  Just make sure it’s soft enough so you don’t have to chew it.