Children’s squinting and crooked mouths may be related to bad habits or caused by ADHD or Tourette’s syndrome. 1. Bad habits: some children like to imitate others, if the people around them have a crooked mouth and squinting, the child may cause imitation and gradually develop bad habits, thus appearing often crooked mouth and squinting phenomenon. 2. Hyperactivity disorder: this disease belongs to attention deficit hyperactivity disorder, which can lead to difficulty in focusing the attention of the child, which may appear abnormal performance such as squinting and squinting, and may be accompanied by impulsive willfulness, excessive activity and other manifestations. 3. Tourette’s Syndrome: This is a tic disorder, and the typical symptom of the child is sudden, involuntary, multi-site motor tics, which may show symptoms of squinting and squinting. It may also be accompanied by head shaking and shoulder shrugging. Children with squinting and crooked mouths may also be caused by other reasons. If accompanied by other obvious discomforts, consult a doctor as soon as possible for a clear diagnosis of the causative factors, and then give targeted treatment.