The following clinical symptoms can be seen in children with Yin deficiency and internal heat: firstly, the symptoms of Yin deficiency, which can cause dry lips and dry skin, and very little urine, and then the tongue is often red, and the tongue moss is small. The second symptom is internal heat, because a deficiency of yin can cause hyperthermia, which can lead to an increase in heat. For example, children may have a sore throat and dry eyes, and the urine is very yellow and the stools are often very dry. For children with yin deficiency and internal heat, on the one hand, yin tonic treatment should be carried out, and on the other hand, heat treatment should be carried out in a timely manner, and Zhi Bai Di Huang Pills can be applied, which can play a good role in nourishing the yin and reducing the heat.