They do not grow and are comprised of dark pigment gathered at certain points on the outer surface of the body. (dog-health-handbook.com)
The increase in circulation pumps the blood towards the outside surface of your body, taking with it any bacteria or other illness - causing substances. (infraredsauna.com)
Start with your feet moving your way up towards the heart with repeated medium size light strokes covering the entire surface of your body. (hawaiinaturopathicretreat.com)