1, endocrine genetic metabolic diseases: growth hormone deficiency, hypothyroidism, precocious puberty, Turner. 2, intrauterine growth retardation: less than gestational age children (mother’s intrauterine infection) 3, congenital, genetic factors: premature birth, parents genetic height is not enough 4, nutritional deficiencies: vitamin D deficiency, picky eating, partial eating 5, frequent illness: long-term colds, fever, diarrhea, etc. 6, chronic diseases: chronic kidney disease, liver disease, anemia, chronic infection, etc. 7, unknown causes (idiopathic): with/without familial: 60% of us We know that prenatal pathological factors such as heredity, chromosomal variation, intrauterine growth retardation and postnatal diseases such as pituitary abnormalities, intracranial tumors, trauma, infections, anemia, heart disease, renal insufficiency and hypothyroidism can affect the height of children and their own growth hormone secretion. We may not be able to avoid these accidents by human power alone, but please believe that timely supplementation of exogenous growth hormone can help these unfortunate children grow taller in a healthy way, and when the primary disease can be controlled, your child can obtain an ideal height at the same time.