Electrical Stimulation has been used since the 1940's and may be best described as an electrical muscle massage. It is used primarily for treating muscle spasms, but since many tissues in the body are receptive to electrical currents, we are able to get a carry over to hyperactive nervous tissue also. The electric current not only works to relax tight spasmed muscles, but also at a cellular level to help normalize the microscopic function of the cells. E-Stim is typically used in conjunction with cold packs and and/or hot packs to further benefit the effects of both.