Clinical manifestations of kidney yin and yang deficiency include frequent urination, turbidity like paste, emaciation of the face, lumbar and knee weakness (a feeling of soreness and weakness in the lumbar and knee areas), lack of warmth in the limbs, and fear of cold limbs and chills, etc. Men may also suffer from spermatorrhea and impotence, and women may suffer from uterine cold and menstrual irregularities. Kidney yin and yang deficiency refers to the co-existence of kidney yin deficiency and kidney yang deficiency, mostly caused by factors such as physical weakness, old age, over-exertion of labor and injuries, and indiscretion in sexual intercourse. The treatment should nourish yin and warm yang, tonify the kidney and solidify astringency, in order to achieve the reconciliation of yin and yang, and can often be used to replenish the spleen and benefit the kidneys oral solution and other proprietary Chinese medicines to treat. The oral liquid is composed of Epimedium, Bacopa monnieri, antler velvet and Semen cuscutae, which has the effect of tonifying the kidneys and assisting the yang, benefiting the qi and nourishing the yin. It is used to treat kidney yang insufficiency (lack of yang in the kidneys) or kidney yin and yang deficiency, with symptoms such as lumbar and knee soreness, fear of cold and cold limbs, fatigue (mental fatigue, physical fatigue), and dizziness and tinnitus, etc. After taking this medicine, some patients may have a problem with the yin and yang. Dizziness, elevated blood pressure, epistaxis (nosebleed), mouth ulcers, red tongue and dry mouth may occur in individual patients after taking this drug and should be stopped immediately. It is not suitable for patients with yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire). Diabetic patients should be cautious. Patients should be guided to use the medicine by professional Chinese medicine practitioners after diagnosis and treatment, and should not take the medicine blindly.