User:Matzerath1/Asthma trigger

An asthma trigger is a thing that causes a person with asthma to experience an increase in symptoms, sometimes resulting in an asthma attack or status asthmaticus. Sometimes a trigger is so prominent in a persons asthma that it is added to describe it such as exercise-induced asthma.

Inhaled allergens
Allergy is a primary cause of asthma symptoms . According to the NAEPP Guidelines, the "first and most important step in controlling allergen-induced asthma is to reduce exposure to relevant indoor and outdoor allergens"

Inhaled respiratory irritants
A variety of irritants can induce asthma symptoms, including cigarette smoke, fireplace smoke, ashes, aerosol sprays, perfumes, cooking odors, musty odors, shower steam, traffic fumes, air pollution, desert dust, and workplace irritants.

Emotional state
(eg, anxiety, sudden upsets)

Common triggers

 * Animals (pet hair or dander)
 * Dust
 * Changes in weather (most often cold weather)
 * Chemicals in the air or in food
 * Exercise
 * Mold
 * Pollen
 * Respiratory infections, such as the common cold
 * Strong emotions (stress)
 * Tobacco smoke
 * Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) provoke asthma in some people.

Allergies
Many people with asthma have a personal or family history of allergies, such as hay fever (allergic rhinitis) or eczema. Others have no history of allergies.