Children often snore in their sleep, not as a sign of good sleep, but as a sign of a medical condition called “sleep apnea hypoventilation syndrome”, mainly due to inflammation of the tonsils or adenoids, which leads to a narrowing of the airway and poor airway ventilation, thus affecting breathing. Abnormalities in the jaw structure, namely the small jaw, can also cause sleep breathing disorders, and snoring in obese children occurs at a higher rate than in normal children. When a snorer sleeps, he or she frequently has poor breathing or pauses and holds his or her breath, exhaling more than he or she inhales, so the brain is in a state of hypoxia, forming hypoxemia. Due to the reduced secretion of growth hormone at night, growth and development will be delayed, and abnormal behavior or personality will be odd and temperamental. Some studies have found that the incidence of inattentive hyperactivity in children who snore is two times higher than in children who do not snore. Therefore, don’t leave out snoring when looking for the cause of your child’s difficulty in paying attention. You can visit the ENT department of a hospital so that the doctor can look for the cause of snoring and give the appropriate treatment to improve your child’s ability to pay attention.