A Leech can suck about ten times of its own body weight, hence the leech is suitable as a therapeutic aid for blood letting. During the process of sucking, leeches secrete various biological enzymes in to the blood though its saliva. Hirudin is one important component which act as anti-coagulant.

Explanation:

A condition in which skin cells build up and form scales and itchy, dry patches.

Psoriasis is thought to be an immune system problem. Triggers include infections, stress and cold.

Take daily baths. ...

Use moisturizer. ...

Cover the affected areas overnight. ...

Expose your skin to small amounts of sunlight. ...

Apply medicated cream or ointment. ...

Avoid psoriasis triggers. ...

Avoid drinking alcohol.