Asthma is caused by an immune system that is oversensitive making your airways to become swollen and air hard to pass when exposed to triggers.
Triggers or things that start making it difficult for you to breath well and may include pollen, pets, mold, dust-mites, tobacco smoke exercise, and cold air among others.
Triggers or things that start making it difficult for you to breath well and may include pollen, pets, mold, dust-mites, tobacco smoke exercise, and cold air among others.