Sleeping mouth foam may be adenoid hypertrophy, pesticide poisoning, epilepsy and other causes. 1. Adenoid hypertrophy: mostly seen in children, mainly because of the hypertrophy of the adenoids block the posterior nostrils, leading to sleep on the upper respiratory tract is narrow, affecting the normal ventilation, there will be sleep foaming at the mouth, snoring and other symptoms. 2. Pesticide poisoning: mainly organophosphorus pesticide poisoning, may be caused by long-term unconscious exposure. When the poisoning is mild, it is manifested as foaming at the mouth when sleeping, and when the poisoning is serious, there will be dizziness, fatigue, headache and other symptoms. 3. epilepsy: due to the patient’s brain neuron damage, easy to cause abnormal discharge, if the night seizure, there may be foaming at the mouth, eyes rolled up, convulsions and other symptoms. Sleeping foaming at the mouth if the symptoms recur, you should promptly go to the hospital, identify the cause, follow the doctor’s instructions targeted treatment.