When the air conditioner is on and you feel that you can’t breathe, most of it is due to the fact that the air conditioner is often on and the windows are not opened for ventilation, the quality of the air is not very good and the oxygen content drops. If you often turn on the air conditioner and do not pay attention to cleaning inside the air conditioner, the wind blowing out will also stimulate the respiratory tract. If more serious cases, it may cause tracheal spasm, but also cause laryngeal edema, is prone to this feeling, you need to open the windows to ventilate, and timely clean the dirt inside the air conditioner. If the usual health is not very good, with poor heart function, coronary heart disease, these symptoms will have aggravated. After ruling out these causes, there is also the possibility that it is caused by neurosis, mainly in the confined space is prone to this feeling.