Children sleeping out of breath thick voice may be physiological factors, but also may be related to pathological factors (upper respiratory tract infection, allergic rhinitis). 1. Physiological factors: Because the respiratory system and nervous system of children are not fully developed, resulting in less gas storage and unstable respiration, the phenomenon of children’s loud and thick breathing may occur. 2. Pathological factors: pathological factors generally include upper respiratory tract infections, allergic rhinitis, adenoid hypertrophy and other diseases. (1) Upper respiratory tract infection: if a child suffers from upper respiratory tract infection due to cold or bacterial or viral stimulation, the inflammation may stimulate the respiratory tract, resulting in an increase in respiratory secretions, so the phenomenon of a child’s loud and coarse sleep may occur. (2) Allergic rhinitis: if the child is exposed to dust mites, pollen, fungi and other environmental allergens stimulate the nasal mucosa, or the child himself belongs to the allergic body, allergic rhinitis may occur, so that the child’s nasal mucosa edema and congestion symptoms, if the child is breathing due to the swelling of the nasal mucosa by the resistance, so the child sleeps in the thick voice. Children sleep out of breath thick voice, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.