Hydrotherapy is a physiotherapy method in which water is used as a therapeutic and prophylactic factor. The basis of hydrotherapy are mechanical, thermal and chemical factors affecting the body with ordinary water. During a hydrotherapy session, irritation of the nerve endings located on the skin occurs, which leads to the appearance of a nerve impulse that enters the body's centripetal pathways to the brain and spinal cord. A nerve impulse is returned along centrifugal paths to an organ conjugated with a specific part of the spinal cord. For example, cooling of the chest causes a narrowing of the vessels of the lungs, and warming the lower back causes dilation of the vessels of the kidneys. Heat effects on the body increase metabolism, improve metabolism, stimulate blood circulation, and contribute to enhancing the secretory activity of the pancreas and stomach. Warm or hot water has a sedative and analgesic effect, reduces muscle tone, stimulates the activity of the endocrine system and "starts" immune processes. Hydrotherapy with cold water is accompanied by changes in the vessels: in the first phase, their narrowing occurs, in the second - expansion, with subsequent acceleration of blood flow. Under the influence of chilled blood, the body reacts in the form of an enhanced release of hormones — adrenaline and thyroxin. The action of hormones causes the breakdown of nitrogen-free substances, causing cleansing and firming effects. Contrasting procedures that are part of hydrotherapy, by directing blood flow either into the body or back to the skin, train microcirculation processes, help normalize blood pressure, have a positive effect on the cardiovascular system, and stimulate metabolic processes. Hydrotherapy with water with the addition of various ingredients: plant extracts.