The diagnosis of malnutritional edema is usually considered from the following three aspects: medical history (including current and past history), physical examination, and auxiliary examination. 1. Medical history: Malnutritional edema is usually seen in infants and young children, pregnant women, burns, and people with a history of chronic wasting disease, such as oncologic disease, anemia, and cirrhosis of the liver. Severe inadequate intake or excessive loss of large amounts of protein over a long period of time can cause malnutritional edema, which is characterized by weight loss and emaciation before edema. 2. Physical examination: malnutritional edema is characterized by poor nutrition, emaciation, dry and loose skin, and generalized edema, which is characterized by depressed edema, usually starting from the feet and then spreading all over the body. 3. Auxiliary examination: blood routine of patients with dystrophic edema usually indicates anemia, low plasma protein and abnormal determination of trace elements. In addition, x-ray examination of infants and young children with dystrophic edema reveals skeletal deformities. If malnutrition edema, it is recommended to go to the hospital for examination, and follow the doctor’s instructions for timely and targeted treatment, so as not to delay the course of the disease.