Leech therapy, also known as hirudotherapy, is a medical treatment that uses live leeches to promote healing. The leeches are applied to the skin, where they attach and feed on blood. During this process, they release saliva containing beneficial substances, such as anticoagulants, which help improve blood circulation and reduce swelling. This therapy has been used for centuries and is often employed in modern medicine for specific conditions, such as reconstructive surgery and venous congestion. While it may sound unusual, leech therapy is considered safe when performed by trained professionals in controlled environments.