Leeches are commonly known as a kind of animals that suck blood, and there is fresh water, terrestrial and marine leeches. Scientifically it is categorized as annelids, which is segmented worms comprising the subclass Hirudinea. It is closely related to earthworms, and it is hermaphrodites that have both male and female reproductive organs.
Leeches can be used in many applications especially for medical and cosmetic purpose. Traditional use of leeches is by letting the leech to suck blood of the patient’s body to relief symptoms like headache and join pain. Leech oil is known to the local community for enhancing the sex capability of man. In India, it is used for preventing hair loss. Chinese medicine use leech as and ingredient for various treatments. Modern medicine uses the ingredient extracted from leech to cure blood related diseases.