Massage is known to increase the circulation of blood and flow of lymph. The direct mechanical effect of rhythmically applied manual pressure and movement used in massage can dramatically increase the rate of blood flow. Also, the stimulation of nerve receptors causes the blood vessels (by reflex action) to dilate, which also facilitates blood flow.
A milky white fluid called lymph carries impurities and waste away from the tissues and passes through gland-like structures spaced throughout the lymphatic system that act as filtering valves. The lymph does not circulate as the blood does, so its movement depends largely on the squeezing effect of muscle contractions. Consequently, inactive people fail to stimulate lymph flow . On the other hand, the stimulation caused by vigorous activity can be outstripped by the increased waste produced by that activity. Massage can dramatically aid the movement of lymph in either case.
For the whole body to be healthy, the sum of its parts–the cells–must be healthy. The individual cells of the body are dependent on an abundant supply of blood and lymph because these fluids supply nutrients and oxygen and carry a way wastes and toxins. So, it is easy to understand why good circulation is so important to our health and why massage can be so beneficial for the entire body due to its effect on circulation alone.