If you have allergic rhinitis, there are medications you can purchase as tablets, nose drops or sprays. These include: antihistamines, steroids, leukotriene receptor antagonists, chromones, and decongestants. Research shows these are all effective treatments.

This resource explains how to use an epinephrine injector for a severe allergic reaction. Call 911 immediately after using this medication.

Oral allergy syndrome is a type of food allergy caused by uncooked fruits, raw vegetables and nuts. The most common symptom is itching of the mouth and throat. In most cases avoiding the foods that cause symptoms is the best treatment.

Hives are raised, itchy bumps that are red in colour. Hives usually appear suddenly and last a few days to a week or two. Treatment can include antihistamines, oral steroids, and avoiding allergens or other triggers. See a doctor immediately if your hives appear with serious allergy symptoms such as trouble breathing, vomiting or passing out.

Difficulty breathing, lightheadedness, and vomiting are symptoms of a food allergy. Get emergency medical help if you suddenly experience these symptoms after eating.

Allergic rhinitis can be caused by outdoor and indoor allergens, including pollens, insects, animals and molds. Tracking your symptoms and referral to an allergy specialist can help to identify - and avoid - triggers.

People may have allergic and nonallergic reactions to penicillin. Allergic reactions can be severe and life-threatening. Non-allergic reactions include stomach upset and diarrhea. A skin test before using pencillin can determine if you are allergic.

After being stung by an insect, try and remove the stinger quickly. Common reactions include pain and swelling. Ice, antihistamines and pain relievers can help. Nausea, vomiting or difficulty breathing are signs of an allergic reaction: call 911 immediately.

Avoid triggers to prevent an asthma reaction. This resource describes many different types of triggers that might make your asthma worse. Pay attention to your symptoms to find and avoid things that are triggers for you.

Anaphylaxis is a severe and life-threatening allergy most often caused by foods, medications or insect stings. Common symptoms are difficulty breathing, flushed skin, vomiting and dizziness.

A severe allergic reaction (anaphylaxis) requires urgent help. Give epinephrine first if possible and go to the hospital right away. See an allergist and identify triggers to prevent reactions.

Hay fever is an allergy to pollen in the air. You may sneeze a lot, have a runny nose and itchy eyes, or wheeze when you breathe. Try nose and eye drops, allergy medications, and keep your windows closed.

A penicillin skin test is used to see if a person is allergic to penicillin. Negative results mean there is likely no allergy. Allergic reactions to penicillin can include fever, muscle pain and even death.

Allergen-specific immunotherapy is designed to reduce allergy symptoms in the medium to long term by repeatedly exposing the person to an allergy extract over a long period of time. Research has shown it is effective for treating hay fever and year-round (perennial) allergic rhinitis. Around 50% of those treated with immunotherapy experience mild and temporary side effects. Serious side effects can occur but are very rare. Talk with your doctor to see if allergen-specific immunotherapy is right for you.

Food allergies can cause serious or even life-threatening reactions. Adults and parents of kids with food allergies can learn how to read food labels to avoid eating these foods. Read this resource for other tips to avoid allergic reactions from food.

Dust mites are not visible, but can cause an allergic reaction such as runny nose, itchy eyes and wheezing. Keep your bedding and home free of dust. More tips and questions to ask your doctor in this resource.

Fire ants can sting and cause an allergic reaction. Kill the ant and wash the sting site with soap and cool water. Antihistamines can help reduce itching. Get emergency treatment if you show signs of anaphylaxis (trouble breathing or swallowing, fainting).

To relieve symptoms of sinusitis your doctor may suggest nasal sprays, decongestants, and pain relievers. Antibiotics and immunotherapy are other treatment options in certain cases.