About allergic reactions
- Allergens only cause reactions in people who are allergic to them. Allergic reactions depend on specific responses by the immune system to things in the environment.
- In high-risk patients, avoidance of certain things that tend to cause these reactions can sometimes help prevent them. Once an allergy starts, avoidance is a mainstay of therapy.
- Most people with allergies tend to inherit them from one or both parents.
- Although allergies may only be noticed later in life, they usually begin during childhood.
How we make contact with allergens
- Inhaled through the nose and lungs (pollens, house dust, and animal danders)
- Ingested or taken in by mouth (foods, drinks, and medications)
- Contacted by the skin (dust, animal dander, and even foods)
- Injected through the skin (insect stings and injected medications)
Common symptoms of allergies
Common allergic conditions
- Allergic rhinitis
- Atopic dermatitis
- Childhood asthma and wheezing
- Eosinophilic esophagitis
- Food allergies
- Hereditary and acquired angioedema
- Immunodeficiencies and recurrent infections
- Latex allergy
- Pollen, animal dander, mold and mite allergies
- Reactions to stinging insects
- Suspected allergic reactions to drugs