As a non-drug treatment of some diseases of internal organs used ordinary medical leeches (hirudotherapy). The therapeutic effect of occupational therapy is based on the ability leeches have on the human body krovoizvlekayuschee, analgesic, anti-inflammatory effect, prevent the formation of blood clots in the blood vessels. Leeches are used in the treatment of hypertension, coronary heart disease (angina, myocardial infarction, cardio), circulatory failure, accompanied by stagnation in the lungs, liver, edema, thrombophlebitis, thrombosis, cerebral vascular, gynecological diseases, abdominal organs inflammatory, diseases of view, accompanied by an increase in intraocular pressure and a number of others. Medical leech has an elongated, somewhat thickened in dorsoventrally body ringed structure capable to stretch and shrink. Leeches color olive green, orange stripes on the back, along the edges of the abdomen black. At both ends of the body are suckers: always good tail prominent and visible only when sucking oral. In the depths of the oral sucker has a hole behind which are placed three rows of sharp jaw with small teeth . The secret of the salivary glands, ducts which open between the teeth contains hirudin – substance having the properties to slow blood clotting. There are three varieties of medicinal leeches, differing in color and pattern, but the same-size (8-12 cm in length); their weight depends on the blood supply. Hungry leech mass of about 2 g may be at a time suck 10-15 ml of blood, which is deposited in the digestive system, which occupies most of the body cavity. Medical leeches have sight, smell, taste, touch. They avoid silnopahnuschih surfaces of the body and more likely to stick to warm skin. For their livelihoods leeches need oxygen. At home, the leeches should be stored in a glass jar with a wide mouth closed tightly tied with gauze. Water should be raw (containing oxygen), preferably lake or river / Tap water leeches need to change the harvest per day, that during this time she was free from chlorine, disastrous for leeches, and acquired at room temperature. Changing the water once a day, you need to carefully wash the vessel of mucus and fill it halfway. The room in which the bank with leeches should maintain a uniform temperature, and it should not be any sudden and unpleasant odors.