Physical analgesia is the application of physical factors for pain management. In physical analgesia a lot of physical modalities are used: Preformed modalities (Electric currents; Ultra-sound; Magnetic field; Laser; Deep Oscillation); Natural modalities (Kryo-factors; Thermo-agents; Hydro- and balneo-techniques; Physiotherapy techniques; hydro and balneo-physiotherapy; Peloidotherapy); Reflectory methods (physical modalities in reflectory points and zones). We propose our own theory for e...