Allergies: Common Causes and Best Treatments

A little girl standing on meadow.

According to, up to 50 million Americans, including millions of kids, have some type of allergy. In fact, allergies cause about 2 million missed school days each year.

Allergies are abnormal immune system reactions to things that are typically harmless to most people. When a person is allergic to something, the immune system mistakenly believes that this substance is harming the body.

Seasonal allergies in kids and toddlers often look like the common cold, but won’t go away without treatment.

What Causes Allergies?

Common Airborne Allergens

Some of the most common things people are allergic to are airborne (carried through the air):

  • Dust mites 
  • Pollen 
  • Molds 
  • Pet dander 
  • Cockroach saliva and feces

Common Food Allergens

Up to 2 million, or 8%, of kids in the United States are affected by food allergies.

Eight foods account for most of those: cow’s milk, eggs, fish and shellfish, peanuts and tree nuts, soy, and wheat.

Other Common Allergens

  • Insect allergy
  • Medications
  • Chemicals

Symptoms of Allergies

Allergy symptoms, which depend on the substance involved, can affect your airways, sinuses and nasal passages, skin, and digestive system.

Allergic reactions can range from mild to severe. In some severe cases, allergies can trigger a life-threatening reaction known as anaphylaxis.

  • Hay fever, also called allergic rhinitis, can cause sneezing, itching of the nose, eyes or roof of the mouth, runny, stuffy nose, watery, red or swollen eyes (conjunctivitis)
  • A food allergy can cause tingling in the mouth, swelling of the lips, tongue, face or throat, hives, or anaphylaxis.
  • An insect sting allergy can cause a large area of swelling (edema) at the sting site, itching or hives all over the body, cough, chest tightness, wheezing or shortness of breath or anaphylaxis.
  • A medication allergy can cause hives, itchy skin, rash, facial swelling, wheezing, or anaphylaxis.
  • Atopic dermatitis, an allergic skin condition also called eczema, can cause skin to itch, redden, flake or peel.


Some types of allergies, including allergies to foods and insect stings, can trigger a severe reaction known as anaphylaxis. A life-threatening medical emergency, anaphylaxis can cause you to go into shock.

Signs and symptoms of anaphylaxis include:

  • Loss of consciousness
  • A drop in blood pressure
  • Severe shortness of breath
  • Skin rash
  • Lightheadedness
  • A rapid, weak pulse
  • Nausea and vomiting

How Are Allergies Diagnosed?

Your doctor can diagnose allergies in several ways.

First, your doctor will ask about your symptoms and perform a physical exam. They will ask about anything unusual you may have eaten recently and any substances you may have come in contact with. For example, if you have a rash on your hands, your doctor may ask if you put on latex gloves recently.

Lastly, a blood test and skin test can confirm or diagnose allergens your doctor suspects you have.

Treatments for Allergies

In general, there is no cure for allergies. The best way to avoid allergies is to stay away from whatever triggers the reaction. If that’s not possible, there are treatment options available.

Medications for Allergies

Allergy treatment often includes medications like antihistamines to control symptoms. What your doctor recommends depends on the severity of your allergies.

Allergy medications include:

Singulair should only be prescribed if there are no other suitable treatment options. This is because it increases your risk of serious behavioral and mood changes, such as suicidal thoughts and actions.

Eye Drops for Allergies

Nasal Spray for Allergies

Inhaler for Allergies


For severe allergies or allergies not completely relieved by other treatment, your doctor might recommend allergen immunotherapy. This treatment involves a series of injections of purified allergen extracts, usually given over a period of a few years.

Another form of immunotherapy is a tablet that’s placed under the tongue (sublingual) until it dissolves. Sublingual medications are used to treat some pollen allergies.

Emergency Epinephrine

If you have a severe allergy, you might need to carry an emergency epinephrine shot at all times.

Given for severe allergic reactions, an epinephrine shot (Auvi-Q, EpiPen, EpiPen Junior, Allerject, Emerade, Adrenaline, others) can reduce symptoms until you get emergency treatment. is certified by Canadian International Pharmacy Association (CIPA). No hidden costs, no membership fees, just great savings on all your prescription needs.

Next time before you place order, especially on brand name medications, call us to see if we can match the price and help you keep more money in your pocket.



This article is sponsored by Jason’s If you have questions about your prescription medications or any other medication, please contact our team at Jason’s by calling toll free 1-800-991-0282. One of our patient representatives will be happy to assist you or transfer you to a licensed Canadian pharmacist for a free consultation.

This article contains medical information provided to help you better understand this medical condition or process and may contain information about medication often used as part of a treatment plan prescribed by a doctor.  It is not intended to be used as either a diagnosis or recommendation for treatment of your medical situation.  If you are unwell, concerned about your physical or mental state, or are experiencing symptoms you should speak with your doctor or primary health care provider. If you are in medical distress, please contact emergency services (such as 911).

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