Water healing, or hydrotherapy is part of physiatry, when the organism is not only influenced by thermal energy, but also by kinetic energy, or by special chemical substances which occur in the water environment with a preventative, healing and rehabilitation aim. A cold and icy bath is an excellent strengthening tool. A hot bath opens the pores and utilises secretion of impurities from the body, a lukewarm bath calms the nerves and regulates the circulation.