An allergy is a condition caused by the immune system’s hypersensitivity to certain substances in the environment. These substances are generally harmless for most people.
What are the common substances that cause allergies?
Some of the most common allergens are:
Some food items
What are the types of allergies?
The following are some of the types of allergies:
Respiratory allergies such as hay fever, pollen allergy and dust allergy
Food allergies such as lactose intolerance, nut allergy and soy allergy
Skin allergies such as hives, angioedema and contact dermatitis
Eye allergies such as allergic conjunctivitis
Drug allergies such as hypersensitivity to amoxicillin, etc.
What are the symptoms of an Allergy?
Different allergies have different symptoms. Some of the symptoms of the most common allergies are:
Respiratory allergies: runny, blocked or itchy nose, watery, itchy or swollen eyes, cough, shortness of breath
Food allergies: vomiting, tingling in the mouth, stomach cramps, swelling of the lips, face, tongue or throat, mouth itchiness
Eye allergies: watery or swollen eyes, redness in the eyes, itching
Medicine allergies: rashes, itching, face swelling
How is an allergic reaction diagnosed?
Some of the diagnostic tests for allergic reactions are:
Skin prick test
What is Anaphylaxis?
Anaphylaxis is a severe and fatal allergic reaction. It occurs within seconds or minutes of being exposed to an allergen. Anaphylaxis triggers a release of chemicals from the immune system that cause a person to go into shock; there is a sudden drop in blood pressure and breathing gets blocked because the airways narrow down. Signs and symptoms include a fast, weak pulse, rashes, and nausea and vomiting. Common triggers are latex, certain foods, medication, and insect venom. Anaphylaxis can be treated with an injection of epinephrine and monitoring the health in the emergency room. If anaphylaxis isn't treated right away, it can be life-threatening.