At three months old, a preemie is unable to lift their head, has difficulty drinking water without choking, leans to one side, and does not smile much. Besides possible nutritional deficiencies and anemia, developmental delays should be considered. It is recommended to undergo a brain MRI to check the brain development and try supplementing with licorice zinc and iron-fortified oral liquid. Pay attention to adding complementary foods in a reasonable manner. It is advised to seek treatment from a professional hospital.