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呼吸道梗阻有各种各样的情况能影响正常鼻呼吸。患急性感冒时不能经鼻腔呼吸,慢性感冒能使粘膜肥厚以致鼻呼吸十分困难。空气中的尘土和烟雾或吸烟过量也会
Respiratory obstruction There are a variety of conditions that can affect normal nasal breathing. Acute cold can not breathe through the nose, chronic cold can mucosal hypertrophy so nasal breathing is very difficult. The dust and smoke in the air or smoking too much will be