December 11th, 2018
What are allergies?
Allergy problems (“allergies”) happen when a person’s immune system overreacts to an allergen. An allergen is any substance that causes the immune system to overreact (“allergic reaction”).
How do allergies affect asthma?
For persons with asthma and allergies, exposure to allergens can increase asthma symptoms and trigger asthma attacks. In these individuals, exposure to allergens can also cause symptoms such as sneezing, stuffy nose, or itchy eyes.