There are several main reasons that cause children to defecate one by one: 1. Because the child belongs to the constitution of yin deficiency, if the child belongs to the constitution of yin deficiency, the intestine is dry, the stool is dry, and the urine output is small, it will cause one stool. Children can be relieved by nourishing yin drugs in time, such as rehydration soup. 2. Due to the accumulation of heat in children's spleen and stomach, if the accumulation of heat in children's spleen and stomach is serious, it will also cause one stool, often accompanied by symptoms such as bad breath, which can promptly remove the accumulation of heat in children's spleen and stomach. For example, Wang Shibao and other drugs can effectively improve the abnormal stool in children.