The contraindication of drinking rehmannia root water for children is not clear, but because of the weakness of children’s spleen and stomach, it is recommended to follow the doctor’s advice to use in moderation, do not take rehmannia root water on their own, and need to pay attention to the spleen and stomach cold (spleen and stomach weakness cold) patients should not be used. Rehmannia glutinosa is not a substitute for medication, and the efficacy of the medication in water is limited, so if you have any symptoms, please consult a doctor in time. Rehmannia glutinosa is sweet in taste and cold in nature, with the effect of clearing heat and fire (removing heat and fire from the body), generating fluids and quenching thirst (promoting the production of fluids to relieve thirst), and diuretic. It can be used to treat fever and thirst (irritable thirst caused by heat in the body), lung-heat cough (cough caused by heat in the lungs), and hot shower (burning and stinging pain during urination, accompanied by frequent urination and urgency, and discomfort of pulling in the abdomen) and astringent pain. Adverse effects of Rehmannia glutinosa are not known. Contraindications are unclear. Note that patients with cold spleen and stomach should be cautious, so children with cold spleen and stomach should not drink rehmannia root water. If you have a need for medication, you need to use it under the guidance of a doctor to identify the evidence, and not blindly use the medication on your own to avoid adverse consequences.