Colla Corii Asini, mulberries, oysters and other medicinal herbs can be used to nourish yin and tonify yin, and can be used by both men and women. 1. Colla Corii Asini is sweet and flat in nature, and belongs to the lung, liver and kidney meridians. It has the effect of nourishing blood and yin, moistening dryness and stopping bleeding. It can be used for blood in urine and vomiting, fetal leakage in pregnancy (small amount of vaginal bleeding in early pregnancy), metrorrhagia (excessive menstruation or more than a few drops of menstruation), blood in stools; palpitation and dizziness, blood deficiency and atrophy, impotence and weakness of the muscles; and heat illnesses that injure the yin and make the patient upset and unable to sleep. The adverse effects of this product are not clear, people with weak spleen and stomach should be cautious. 2. Mulberry is sweet, sour and cold. It belongs to heart, liver and kidney meridians. It has the effect of tonifying blood and nourishing yin, moistening dryness and promoting generation of fluids, and can be used for internal heat and thirst (internal heat accompanied by symptoms such as overeating, drinking and urinating), thirst, constipation; yin deficiency of liver and kidney (deficiency of yin in the liver and kidneys), premature whitening of the beard and hair, palpitation (accelerated heartbeat often accompanied by panic), insomnia, and dizziness and ringing in the ears. The contraindications and adverse reactions of this product are not clear. 3. Oyster is salty and slightly cold. It belongs to liver, gallbladder and kidney meridians. It has the effects of calming the liver and extinguishing wind, tranquilizing the mind (using ores and shellfish to stabilize the mind), and softening and dispersing knots (softening and dispersing hard lumps). Oyster can be used for restlessness of the heart and mind; hyperactivity of liver yang (excessive liver yang, causing dizziness, dizziness, headache and other symptoms), dizziness and tinnitus; seminal emission and slippery semen, spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with a little movement), night sweating (sweating abnormally after going to sleep, sweating stops after waking up), leakage of blood with menstruation and so on. This product should not be taken more than once for a long time, and the contraindications are not clear. Please do not use the drug by yourself. If you feel unwell, it is recommended to go to the hospital for consultation.