Depending on the nature of the heat used, there are: a) moist heat - baths, showers and other types of hydrotherapy, warming compresses, poultices , therapeutic mud, peat, clay, etc .; b) dry heat - heating pads, heating pads (thermofor), dry air and light baths . Deeper warming of tissues is achieved by using high-frequency currents (diathermy) or electric and electromagnetic fields — inductothermy, ultra-high frequency and ultra-high-frequency therapy (see Electrotherapy ). The mechanism of action of thermal procedures, methods of application, indications and contraindications - see. Balneotherapy , Baths, Hydrotherapy , Mud therapy, Ozokeritotherapy, Paraffin therapy, Sand baths , Light therapy .