Symptoms of achondroplasia: First, initial symptoms. This period is dominated by psychoneurological symptoms, the child may be irritable, crying, easy to sweat, after sweating the scalp itchy, while in the pillow repeatedly rubbing, there will be occipital baldness, also known as occipital baldness. Second, acute phase symptoms. In addition to the initial symptoms, there may be skeletal changes, delayed development of motor function, press a finger on the occipital and parietal bones of 3-6 months old children, feel the skull sinking, and then let go of the finger, there will be a rebound, which is called ping-pong sign. 8-9 months old children will have a square skull, fontanel is relatively large, delayed closure of the fontanel, and some children’s fontanel has not been completely closed at 18 months old. The ribs on both sides may appear to be beaded, and some children may have chicken chest, funnel chest, kyphosis, scoliosis, and some children may have O-legs and X-legs. The child’s muscle ligaments are flaccid and without strength, so the abdominal muscles are weak and the abdomen is enlarged, and a frog-shaped abdomen will appear when lying down. Third, recovery period. After a period of treatment, the clinical symptoms slowly disappear, the muscle tone returns to normal, and the blood biochemical changes and X-ray changes are restored.