The effects of lock yang are tonifying kidney yang, benefiting essence and blood, moistening the intestines and relaxing the bowels. It is useful in treating conditions such as deficiency of kidney yang (lack of yang in the kidneys), deficiency of essence and blood, weakness of the waist and knees, impotence and slippery semen. Radix Rehmanniae Praeparata (熟地) generally refers to Radix Rehmanniae Praeparata (熟地黄), which is used for tonifying blood and nourishing yin, benefiting the essence and filling the marrow, and is useful in treating conditions such as deficiency of blood and atrophy of the yellowish color, menstrual disorders, dizziness and tinnitus, and premature whitening of the hair. 1. Lock yang is the dried fleshy stem of Lock yang, a plant of the Lock yang family, which is sweet and warm in nature, and belongs to the liver, kidney and large intestine meridians. The drug has the effect of tonifying kidney yang, benefiting essence and blood, moistening the intestines and relaxing the bowels. It is used in the treatment of kidney yang deficiency, essence and blood deficiency, lumbar and knee impotence, impotence and slippery spermatozoa, and constipation of intestinal dryness, etc. The adverse effects of the drug are not clear. The adverse effects of the drug are not clear, but it is not suitable for people with deficiency of yin and hyperactivity of yang, deficiency of spleen and diarrhea, and constipation with solid heat. 2. Radix Rehmanniae Praeparata is sweet and slightly warm in nature, belonging to the liver and kidney meridians, with the effect of tonifying blood and nourishing yin, benefiting the essence and filling in the marrow. This drug can be used in treating blood deficiency and yellowish color, palpitation (rapid heartbeat, often accompanied by panic), dizziness, irregular menstruation, metrorrhagia (excessive or sporadic menstruation), hemorrhage, yin deficiency of liver and kidney (insufficient yin in the liver and kidneys), lumbar and knee soreness and weakness (a feeling of weakness and tenderness of the lumbar and knees), bone vaporization and fluxing of heat (a burst of heat that feels as if it is penetrating from inside of the bone to the outside), dizziness, tinnitus, and premature graying of the beard and hair. The medicine is not suitable for patients with weak spleen and stomach, stagnant Qi and phlegm, and fullness of abdomen and loose stools (thin and unformed stools). If necessary, it is recommended to go to a regular hospital for consultation and treatment under the guidance of a medical practitioner specializing in diagnosis and treatment.