What's the difference between asthma and broncitis ?

Location in lungs: Asthma is a inflammation and narrowing in the small airways of the lungs (<2mm) while bronchitis is inflammation of the larger bronchi. Asthma can be triggered by smoke, allergies, exercise, and colds. Bronchitis is generally thought of as an infection and smokers can develop chronic bronchitis.

Often confused: Bronchitis is an inflammation of the bronchial tubes. Frequently in smokers, a bacterial infection can be present and antibiotics help. Viral respiratory tract infections can trigger worsening of asthma. With asthma, antibiotics do not help. Anti inflammatory steroids, short acting bronchodilators help. Only rarely is there a bacterial infection that antibiotics help with worsening of asthma.