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Allergies occur when your body's defence system (immune system) overreacts to certain substances. The immune system treats a harmless substance as if it were a harmful germ or virus. Many things can cause this to happen. Examples include pollens, medicine, food, dust, animal dander, and mould.
Your allergies are seasonal if you have symptoms just at certain times of the year. In that case, you are probably allergic to pollens from certain trees, grasses, or weeds.
Allergies can be mild or severe. Over-the-counter allergy medicine may help with some symptoms. Read and follow all instructions on the label.
Managing your allergies is an important part of staying healthy. Your doctor may suggest that you have tests to help find the cause of your allergies. When you know what things trigger your symptoms, you can avoid them. This can prevent allergy symptoms and other health problems.
In some cases, immunotherapy might help. For this treatment, you get shots or use pills that have a small amount of certain allergens in them. Your body "gets used to" the allergen, so you react less to it over time. This kind of treatment may help prevent or reduce some allergy symptoms.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Give an epinephrine shot if:
After giving an epinephrine shot, call 911, even if you feel better.
Call 911 if:
Call your doctor now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor if:
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Current as of: February 10, 2021
Author: Healthwise Staff
Medical Review:Sarah Marshall MD - Family Medicine & Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
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