Allergic rhinitis (also known as hay fever), is an inflammation of the nasal passages caused by an allergic reaction that occurs when the immune system mistakes a usually harmless substance for an invader.
Asthma is a chronic lung disease characterized by inflammation of the bronchial tubes, which makes them swell and narrows the airways. Asthma often begins in childhood, but symptoms can occur at any age.
Attention-deficit/hyperactivity disorder (ADHD) is a neurobiological disorder characterized by impulsivity, inattention, and in some cases, hyperactivity.
Chronic obstructive pulmonary disease (COPD) is one of the most common lung diseases. It makes it difficult to breathe. There are two main forms of COPD: chronic bronchitis and emphysema.