If children have deficiency of qi and blood, they will show the following clinical symptoms: First, they will show weakness of spleen and stomach function. After children have deficiency of qi, especially deficiency of spleen, it will cause weak digestive function, which will cause children to have very poor appetite for eating and low diet, which will cause children to have serious weight loss, and their weight is often lower than children of the same age. Secondly, it leads to low immune function. After the deficiency of Qi and blood in children, the weakness of resistance is also very obvious, and recurrent cough, fever and digestive tract infections will occur. In addition, children with Qi and blood deficiency may also have blood system abnormalities, such as a drop in white blood cell count and hemoglobin, especially a drop in hemoglobin, which can lead to severe anemia.