Description: An Allergy is an immune disorder. Allergic reactions are characterized by over-activation of mast cells which leads to an extreme inflammatory response.
Symptoms: The most common symptom of allergies is itchy skin, however they may also be present in the form of respiratory issues including itching, sneezing, and wheezing. Another symptom of allergies may be vomiting and/or diarrhea.
Common types include food allergies, flea allergies, and inhalant allergies.