In infants and toddlers, the specific manifestations of dwarfism are delayed limb development. In infants and toddlers, the growth and development of dwarfism is slower than that of their peers because of insufficient secretion of their own growth hormones, lack of bones and bone mass, resulting in delayed bone development and shorter height than their peers, but more normal intelligence. Reduced sensitivity of the nervous system is manifested in infants and young children by slow reactions, pain response at the end of the limbs, and dull gaze and depression. The gastrointestinal tract is weakened, and dwarfism is easily manifested by decreased appetite, reduced eating, and even malnutrition.