Interesting Fact - Human Body

Leeches are used as a treatment for hematoma auris, cauliflower ears.

(After a sharp blow, a large blood clot can develop under the skin and block the flow of blood to the cartilage, that gives the ear its peculiar cauliflower shape. The leeches suck out the fluid, but if the cartilage dies, the ear shrivels and becomes lumpy. So further treatment is required.)