Chinese medicine keel was produced in Miocene Tertiary argillaceous rocks, siltstones, Quaternary sediments and other sedimentary rocks about 24 million to 5.2 million years ago.
The role of keel:
The keel has the functions of calming the nerves, calming the liver and suppressing yang, and converging. If there are clinical manifestations such as irritability, palpitation, insomnia, epilepsy, memory loss, dreaminess and depression, they can all be treated through keel. The symptoms of vertigo caused by hyperactivity of liver yang can be treated by nourishing the liver to suppress yang, calming the heart and calming the nerves.
If nocturnal emission, nocturnal emission, frequent urination, enuresis, leukorrhagia, spontaneous sweating, night sweats and kidney meridian deficiency occur, they can all be treated by keel. For skin lesions, such as eczema, itching, chronic ulcer, etc., keel can be ground into powder for external use, which has a good astringent effect, converges local tissue wounds and promotes healing.
Refer to the above? Baidu encyclopedia-keel