If the creatinine level of children is low, it mainly indicates the following problems: 1. Children are in malnutrition, if children have malnutrition, it will cause the symptom of low creatinine level in blood, you can give children appropriate nutrition, for example, you can give children more fish, shrimp, eggs, milk and other high-quality protein. 2. Symptoms caused by children suffering from wasting diseases, if children suffer from chronic nephritis, tumors and other diseases, this will also cause low creatinine level in children, If children suffer from chronic nephritis, tumor and other diseases, the consumption of the body is relatively large, which will also cause low creatinine level in children. It is necessary to increase the nutrition of children and supplement them with enough high quality protein.