A nerve fires at a frequency of 50 Hz carrying a message from the brain or to the brain. When some trauma to the body occurs, the nerve tells the brain something is out. The brain reacts to this process by correcting it. If the damage is too great for the brain to repair easily, it starts sending endorphins to ease the pain. If the damage is to the nerve, the frequency for information is hindered in the flow to the brain. This tuning fork can be used to relieve pain from pulled or strained muscles. It is also excellent for removing those knots that develop in the muscles. It will help in releasing the tightness of cramps so that the muscle will relax and the brain will send the endorphins to help with the pain. Place the end of the stem on the area where there is pain. You may also place the side of the stem in the same area. On the weighted end of the tuning fork pinch the two ends together and slide your fingers off quickly. Hitting the end of the fork on a hard rubber object is not needed to cause the maximum amount of vibration.