Why does my achilles tendon hurt and bother me when i dont exercise and dance but it doesnt hurt when i dance and exercise? its come and go pain and just depends on the day and some days it hurts and other not at all. why is that?

You are correct ….listen to your body. With your activity you warm up the tendon. With rest it stiffens from injury. But the injury, presently is small enough to heal before next activity. I recommend a stretching and strengthening program. This is a warning if you do nothing. Achilles’ tendons have very poor circulation. You should stretch and ice after activity.