Hydrotherapy is one of the oldest forms of treatment. This form of physical therapy is taken from human medicine and modified for preformance in veterinary medicine. Hydrotherapy is a branch of physical therapy that deals with the use of water in any physical condition to treat. It includes internal and external use of water and can be general or local. Immersion hydrotherapy is a proceedure that is based on physico-chemical effects of water on the submerged body. Physical activity includes: gravity, hydrostatic pressure, buoyancy, viscosity, resistance and temperature. Chemical action is based on the influence of dissolved substances and ions on the body. By action of buoyancy, which reduces the load on the musculoskeletal system and hydrostatic pressure, which reduces pain by acting on the afferent nerves of the skin, the motivation of patients to exercise is much higher. Due to the physical properties of water hydrotherapy has a very wide application. The most common indications for the use of hydrotherapy are soft tissue injury, inflammatory and degenerative rheumatic diseases, joint contractures, muscle spasms, post-operative procedures, poor fitness condition, obesity and others. Hydrotherapy procedures can greatly improve the quality of life of patients or if they are implemented correctly.