Yin deficiency

Yin deficiency is a professional term in traditional Chinese medicine, referring to a pathological state characterized by the deficiency of yin fluids such as body fluid, essence, and blood, and a constitutional state characterized by manifestations such as yin deficiency with internal heat. Yin deficiency mainly includes lung yin deficiency, spleen yin deficiency, kidney yin deficiency, and heart yin deficiency. Individuals with yin deficiency primarily exhibit "heat" symptoms, such as dry mouth and tongue, flushed cheekbones, vexation and feverish sensation in the palms and soles, night sweats, red tongue with scanty fluid, and a thready, rapid pulse.