Cortex Eucommiae is effective in tonifying the liver and kidney, strengthening the muscles and bones, and tranquilizing the fetus. It is used for liver and kidney insufficiency (weakness of the liver and kidneys), soreness of the waist and knees, and weakness of the muscles and bones. Cortex Eucommiae belongs to the yang tonic drugs, sweet in taste and warm in nature; it belongs to the liver and kidney meridians, and is used for treating kidney dizziness and dizziness, blood leakage in pregnancy, restlessness of the fetus, and high blood pressure. It is often used with ginseng, Radix Rehmanniae Praeparata and Morinda Citrifoliae if it is used for treating coldness in the lower part of the body, impotence in the kidney, and frequent urination; for treating lumbar pain in the kidney and soreness in the waist and knees (a feeling of soreness and weakness in the waist and knee), it can be used with walnut meat and bone marrow; for treating insufficient kidney qi, lumbar pain and tinnitus, and soreness of the limbs, it can be used with Yanhuisuo and cumin. Cortex Eucommiae can be fried to destroy the gelatin, which is conducive to the decoction of the active ingredients. This drug is a warm tonic, and should be used with caution in cases of yin deficiency (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency fire). The above medicines should be used under the guidance of a doctor, and should not be used blindly to avoid adverse consequences. If there is a deficiency of kidney yang and other uncomfortable symptoms, you need to go to the hospital in a timely manner, by the Chinese medicine practitioner to identify the symptoms and treatments.