Understanding Allergies: Causes and Treatment

Sourced from: http://www.news-medical.net/health/Different-Types-of-Allergies.aspx

Usually there are symptoms that accompany an allergy. It is therefore vital to know the signs or symptoms so as to be able to tell if a person is allergic to a substance.

The part of the body the allergen touches affects what symptoms you develop. For example:

Allergens that you breathe in often cause a stuffy nose, itchy nose and throat, mucus, cough, and wheezing.

Sourced from: http://www.nytimes.com/health/guides/disease/allergies/overview.html

Sourced from: http://www.healthline.com/health/allergies/allergic-reaction-treatment#Treatments3