The child’s sleep talking and yelling at night may be caused by nightmare disorder and night terrors. 1. Nightmare disorder: the etiology of this disease is still unclear, however, relevant studies have shown that prolonged mental stress and post-traumatic stress disorder may induce nightmares. If β-blockers, dopamine agonists and other drugs are used recently, nightmares may also be induced. The child will have anxiety dreams during sleep, which will be manifested as sleep talking and yelling at night. 2. Night terrors: the cause of this disease is also not clear, it may be related to genetic predisposition, poor sleep environment, accidents, harsh criticism, etc. It can be triggered by overwork, intake of excitatory drinks, etc., which leads to the child’s repeated sudden awakening from sleep with abnormal behavior and autonomic hyperfunctioning, so that there is the situation of talking and yelling in sleep at night. When the child sleep talking and shouting at night, parents need to give some attention, and if necessary, need to go to the hospital for medical treatment.