The efficacy of sour jujube kernel in water is to tranquilize the heart and calm the mind, nourish the heart and nourish the liver, and astringent sweat and fluid. However, the active ingredient of drinking water is limited, and it is recommended to decoct it. Sour jujube kernel is the dried mature seeds of sour jujube in the family of Platycodonaceae, and its effects are astringent sweating, generating fluids, nourishing the heart and tonifying the liver, and tranquilizing the heart and the mind. It is mainly used for the treatment of deficiency of yin and blood in the heart and liver, insomnia caused by deficiency and annoyance (annoyance caused by deficiency heat in the body), palpitation and dreaming, palpitation and insomnia, thirst caused by injury to the body fluid, and sweating caused by body weakness, and so on. Sour Jujube Seed is taken internally by decoction. The adverse reactions and contraindications of sour jujube seed are not clear. The therapeutic effect of a single flavor of Chinese medicine in water is limited, and if you feel unwell, it is recommended that you go to the hospital in time, under the guidance of the doctor, so as not to delay the condition.