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Asthma is a chronic inflammatory disease, where the airways get swollen, narrow, and excess mucus is produced. This causes difficulty breathing, wheezing, cough, chest tightness, and shortness of breath. The risk factors for the development of asthma are allergies, environmental factors, smoking, obesity, pregnancy, stress, and genes. The different types of asthma are childhood asthma, occupational asthma, exercise-induced asthma, and allergy-induced asthma. Medicines that are taken for a long time to control the symptoms are inhaled corticosteroids, leukotriene modifiers, long-acting beta-agonists, and Theophylline.