Baby protein is not absorbed, may cause pediatric protein-energy malnutrition, can be divided into wasting type, edema type and mixed type, according to the different subtypes may appear wasting, slow growth, edema, dry skin and other manifestations. 1. Wasting type: the main manifestations are weight loss, obvious wasting, dry and pale skin, slow growth of bones, and height lower than normal for the same age. At the same time, there may also be weakness, fatigue, mental depression or irritability. 2. Edema type: characterized by low-protein depressed edema, manifested by the appearance of fatness and indifference, accompanied by sparse, dry, brittle and yellowish hair. Decreased muscle tone, muscle atrophy, and even inability to stand or walk on their own. 3. Mixed type: both of the above two types of characteristics, patients have both significant weight loss and edema. When babies show signs of protein non-absorption, they should seek medical treatment in time for professional treatment, in order to prevent affecting growth and development or inducing other diseases.