Asthma is a respiratory disease that causes a persons airway to become inflamed and narrowed, resulting in wheezing, coughing, and difficulty breathing. Overexertion, breathing cold air or exposure to certain allergens are common triggers of an asthma attack.

In a study of 288 asthma patients,  60.4% complained of a headache and 32.6% of subjects met the IHS criteria for migraine.1