In general principle, the child’s physical development is good, height and weight in line with the requirements of the age group of children, the specific judgment methods are as follows: 1, the basic criteria: the child a day to live happily, eat well, sleep well, good spirit, lively, do not make trouble, etc.; 2, appearance standards: rosy face, eyes, dense black and lustrous hair, the inner surface of the mouth and lips eyelids red; 3, skin standards: delicate skin is not rough, no rash, etc. The nails are light red; 4, muscle condition: feel the child’s body muscle solid; 5, skin fold thickness: use the thumb and forefinger to pinch the child’s abdominal skin into a fold, measure the thickness of subcutaneous fat should generally be > 0.8cm. skin fold thickness is one of the most commonly used indicators for nutritional evaluation in the work. Subcutaneous fat thickness is an important indicator of good or bad nutritional status, and it also applies to infants and children. When a child is malnourished, the order of subcutaneous fat loss is first in the abdomen, followed by the trunk, extremities and finally the cheeks. Therefore, checking subcutaneous fat thickness can detect abnormalities in children at an early stage. Parents should not wait until the child’s face has shown thinning and then ask the doctor to check, because the subcutaneous fat in the cheeks will be reduced last, if you wait until the cheeks are thinning, there is often more than moderate malnutrition.