What???s triggering them????The most common asthma triggers are allergens such as dust, animals, and even mice and cockroaches,??? says Nadia Hansel, M.D., assistant professor in the division of pulmonary and critical care at Johns Hopkins Medicine in Baltimore.Keep a diary and record when and how your asthma attacks occur, Hansel advises.Skin tests can help determine if allergies set off asthma a