Yin deficiency: also known as yin deficiency and fire flourishing, commonly known as deficiency fire. Yin deficiency is mainly manifested as: fear of heat, irritability, burning in both cheeks, dry mouth and sore throat, dry stool, short red or yellow urine, insufficient body fluid in the tongue, vexation of five hearts (palms, soles of feet and top of head), night sweats, backache, nocturnal emission, slippery nocturnal emission, red tongue, thin or peeled fur, and thready pulse. Nourishing yin, nourishing yin, nourishing yin, etc. Should be used, the drugs for yin deficiency can be Radix Rehmanniae, Radix Ophiopogonis, Rhizoma Polygonati Odorati, Pearl powder, Tremella, Cordyceps, Dendrobium, Carapax et Plastrum Testudinis, etc. 1 Food for nourishing yin: soft-shelled turtle, bird's nest, lily, duck, snakehead, jellyfish, lotus root, Flammulina velutipes, gouqi head, water chestnut, raw pear, etc. , can be taken alternately. 2 examples of dietotherapy remedies for nourishing yin deficiency syndrome: tremella jujube soup (or lily lotus seed soup): take appropriate amount of tremella jujube (or lily lotus seed) and cook it into snacks to nourish yin deficiency syndrome. Turtle Erzi Decoction: 1 turtle, add 20g of Ligustrum lucidum and 20 g of Lycium barbarum, cook together, season and eat in several doses, which can tonify yin deficiency and treat low back pain, nocturnal emission, dizziness and blurred vision caused by yin deficiency of liver and kidney. Dendrobium river fish; Dendrobium 6g, 1 river fish steamed to nourish yin. Cordyceps sinensis old duck: Cordyceps sinensis 9g is cooked with 1 three-year-old male duck, and eating duck meat and duck soup can supplement yin deficiency.