- Severity varies among sufferers.
- Asthmatic attacks begin without warning.
- Airways become constricted and swell.
- Muscles in the lungs automatically tighten.
- Wheezing, coughing or panting begins.
- Mucus is produced.
- Suddenly the asthmatic is gasping for breath.
An assortment of known triggers
- Respiratory infections
- Physical exertion and stress
- Animal dander and bird feathers
- Pollens and various other allergens
- Cockroach and rodent droppings
- Mold, mildew and dust mites
- Second hand smoke
- Certain medications such as aspirin
- Strong perfumes
- Various chemical agents
