What is this a sign of?
Answers: It depends on what type of pain you are experiencing. Does it have a feeling like your muscles are burning or does it grain like your joint are aching. Once you numeral that out you can go from in that. If it is muscle, It is from an acid build up and not really much you can do. If it is common you make want to find out why they are hurting at such a infantile age.
What is the point in haveing eye brows?!?!?
Leg and arm crampsdepends; are u round
Alchoholism.
How do i stop cracking my knees?
that really depends on your age ....so cant really answer that questionmuscle niggle...go see ur doc if u have a feeling it's serious if not simply get a muscle rub resembling 'deep heat' and rub it onto ur arms and legs...