I would outlined in the general range of pathology, which uses Hirudotherapy and which has almost no alternatives from other treatments. First - diseases associated with stagnant lymph and blood, and, of course, are observed during this edema. Another wide range of diseases - is a pathology, accompanied by degeneration and even atrophy. In the first case, a leech increases the outflow of interstitial fluid through the lymph and vein, after which normal tissue homeostasis. But in the second case, due to a significant increase in local and overall microcirculation (i.e., increase blood flow to tissues), and as a consequence - increase tissue nutrition and detoxification. Thus, the leech virtually indispensable when you need to quickly and permanently eliminate puffiness, get a draining effect, to restore the microcirculation of blood, to achieve immune stimulation.