A 10-year-old child with a big face on one side and a small face on the other side indicates bilateral facial asymmetry, which will be dealt with by anti-infection, surgery and correction of bad habits for the cause of the disease; the reasons leading to bilateral facial asymmetry can be divided into congenital causes and acquired causes. 1. Congenital causes: generally congenital developmental abnormalities leading to facial asymmetry; mostly seen in congenital cervical and other diseases. It can be treated by surgery. 2. Disease causes: for example, local tumors, parotitis, can lead to local enlargement, thus appearing facial asymmetry, can be accompanied by pain, chewing difficulties and other manifestations. If there is inflammation, you need to use amoxicillin and other drugs under the guidance of the doctor for anti-infection treatment; if there is tumor, you need to consider surgery. 3. Bad habits: for example, if you often use one side to chew things, it may lead to one side of the biting muscle hypertrophy and make the face asymmetric; usually, you should pay attention to avoid using only one side to chew. Found that the 10-year-old child facial asymmetry, should promptly take the child to the hospital Pentacenter; determine the cause under the guidance of the doctor to take reasonable treatment, so as not to affect the child’s normal learning and life.