Asthma
Wednesday, February 9th, 2011Asthma is a chronic airway disease that involves episodic attacks of breathing difficulty, coughing, and tightness in chest or wheezing. Asthma may be caused by such factors as allergies, cold air, respiratory infections, environmental pollution and smoke, humidity or sudden changes in temperature, as well as strenuous exercise. In very rare cases, asthma may be […]