Enich has a good description of the three. Let me see if mine will correspond.
I use a pain scale that was developed in the medical community for assessing patients and it goes like this:
0= no pain what so ever, no discomfort, no soreness, life is good.
1 to 3 = discomfort. There is a nagging little ache, it doesn’t mess with your life, you can function just fine, but its there. You might want to take/do something for it. (toothache)
4 to 6 = soreness. Now that ache is stronger. Its harder to function, but you still can. Certain movements are more difficult, but you can do them. You definitely want to take/do something for this. (infected tooth needing root canal and crown)
7 to 9 = pain. All you can think about is how to get rid of the hurt. You can no longer function it hurts so bad. You don’t ever want to repeat the activity that caused this. (biting down on an infected tooth on your way to the dentist)
10 = you want morphine, and about 3 hours ago. Think compound fracture, ripping a muscle loose from its origin point, migraine headaches, kidney stones.
Normally, but not always, pain will start out as discomfort, and we just don’t listen to it until its to late. Listen to what your body is telling you and pain can be avoided.
Personally, I’m allergic to pain.