My method (which I've used to may times to be entirely comfortable with) is a little something I call "The Hot CHA CHA". Basically, I take two Tylenol, drink 2cups of coffee, and have a bowl of cereal. Then, while all this is settling in my stomach, I get in the shower and turn it as hot as I can take.
This is where the pain begins. Once I'm acclimated to the hot water, I turn it all the way to cold, cold water. At this point, I sometimes scream. If you do, it's nothing to be ashamed. After a couple minutes of this, I turn it back to the hot water until I'm used to that, then I just keep alternating back ad forth, hot and cold, until, though my sin is usually lobser-red, I lose all sensation in my body.
If you can make it through all this, you will feel better. I usually ascribe it to feeling all the pain of a hangover in 15 minutes,instead of being spread out over several hours. Try it! It's fun!
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See this piece of eggshell I have found you.