Do you have a child like this around you? Shortly after birth, the face looks like the flesh is piled up in the upper part of the face, the jaw is small and receding, the child cries and fusses, eats poorly, has great difficulty in feeding, breathes poorly, has a sunken neck and chest or even blue lips when breathing, wakes up suddenly when falling asleep, cries and fusses, has a blue or pale face, and has frequent pneumonia, etc. These signs indicate that the child has a severe small jaw deformity. If these manifestations are combined with a cleft palate and a retracted tongue, the child has Pierre Robin syndrome. If the jaw is small, it is also associated with droopy eyes, a V-shaped defect or ptosis of the lower eyelid, absence of eyelashes with hypoplasia of the outer lower lid margin and lid plate, poor attachment of the outer canthus, shortened eye fissure, cut marks on the upper lid margin and eyebrows, strabismus, with hypoplasia and absence of the zygomatic bones, absence of the zygomatic arch, with narrow and excessively protruding maxilla, high and narrow palatal arch, or cleft palate, with a protruding and wide nose, and flat frontal nasal angle; with external ear deformity, external ear canal If the child has Treacher Collins syndrome, he/she has an abnormal middle ear, hearing loss, macroglossia, and hair growth extending to the cheeks (sideburns). If the jaw is small with preaxial limb deformities (radial limb hypoplasia, missing or deformed thumbs), the child has Nager syndrome. A child with a severe micrognathia, where feeding and breathing are affected, needs early treatment and early mandibular traction lengthening surgery, otherwise not only is the child’s growth and development poor, but mental development may also be affected due to lack of oxygen, and in severe cases, the child’s life may even be at risk. If treated in time, the child can get good feeding improvement, smooth breathing, and healthy development.