Magnetic Fields is one of the most modern therapeutic methods, which uses the properties of the magnetic field produced artificially with the appropriate devices. A magnetic field, unlike an electric field, can pass through all tissues of the body. Magnetic Fields exert a force on moving electric charges, causing electromagnetic phenomena. Magnetic and electric fields are interconnected: all biological functions require the existence of electromagnetic fields to be carried out. Molecular currents determine the magnetic properties of each tissue, while ionic movements create the magnetic coefficient of muscular, nervous and circulatory activity.