There is also a close relation between pulse manifestations and the natural weather, climate, phonological phenomena.
Spring
By then, the plants begin to sprout and the liver corresponds to spring, hence,
the pulse should be tense (in TCM, it is called a string pulse). It is just like the skylark singing. There are three months in spring. Among these, only 72 days belong to spring, while another 18 days belong to spleen-earth. Further, the liver is connected with the eyes, and the 9th constellation.
Summer
All things in nature are flourishing, and rain is frequent with full moisture. It corresponds to the heart and small intestine, hence, the pulse should be full and robust (in TCM, it is called a full pulse). It is like the singing of a cuckoo, and belongs to the 7th constellation. The three months of summer has only 72 days, with the remaining 18 days belong to the spleen-earth. The heart disease is also connected to the tongue. Abnormalities can be observed through the tongue.
Autumn
All plants have mature fruits in this season. It corresponds to the lung and large intestine, and the pulse is short and rough, like the redheaded bird singing in the sky. In this season, 72 days belong to autumn and the remaining 18 days to spleen-earth, and the 8th, 9th and 16th constellations, lung pulse is also connected to the nose, where its illnesses can be seen.
Winter
By this season, the earth is frozen, with snow and ice. It corresponds to the kidney and bladder. The pulse should be retarded and soft and gentle, like the singing of a gull; it belongs to the 18th, 20th, 23rd constellations. There are three months in winter. Only 72 days belong to the winter season, the remaining 18 days belong to the spleen-earth.
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source :http://www.tcmadvisory.com/index.asp
