Yin deficiency   Yin deficiency indicates consumption or loss of yin fluid which fails to depress the yang part, and leads to depletion in nourishment and moisture of the body. Due to an excess of internal heat, TCM also categorize the syndrome as heat and deficiency types. Individuals are in an excess of heart, Symptoms or signs include afternoon fever, flushed cheeks, feverish sensation in the palms and soles, irritability, insomnia, night sweating, dry mouth and throat, scanty and yellow urine and dry stool. On examination the tongue is red with little coating, and the pulse is thready and rapid.		yin xu 陰虛   陰虛指身體津液、精、血等陰液虧耗而無以制陽，使滋潤、濡養等作用減退，所表現的虛熱証候(所謂陰虛生熱)。屬虛証、熱証範疇。臨床表現以消瘦、口乾咽燥、潮熱顴紅、手足心發熱、盜汗、小便短黃、大便乾結。舌紅少津少苔，脈細數等。有病程長、病勢緩的特點。