Can not smell the smoke of the fire may be physiological factors, there may also be respiratory disorders (such as bronchial asthma, chronic bronchitis, etc.), need to be specifically analyzed. 1. Physiological factors: due to individual differences in physiology, some people will be more sensitive to the smell of smoke, can not smell the smoke of the fire, but there is no other obvious discomfort, is a normal phenomenon. 2. Respiratory disorders: respiratory disorders such as bronchial asthma, chronic bronchitis and other diseases, there is a high reaction of the airway, smoke in the harmful substances such as carbon monoxide can stimulate the respiratory tract and thus chest tightness, wheezing, coughing, coughing up sputum, etc., lung function, chest X-ray and other tests can be used to assist in a clear diagnosis. Can’t smell the fire smoke odor may be physiological factors, may also be the existence of respiratory tract diseases, it is recommended to consult a doctor in a timely manner, a clear diagnosis, timely treatment.