questions to ask before allergy

Overview

An allergy is when your immune system mistakenly treats a harmless substance, such as pollen or dust, as a danger. This causes uncomfortable symptoms like sneezing, itching, or a rash. Allergy tests help you and your doctor identify exactly what triggers your symptoms, so you can make a plan to manage them.

Yes. Allergies are one of the most common long-term conditions worldwide. Millions of people live with allergies, and allergy testing is a routine part of care.

Allergies can affect anyone. They often start in childhood, but people can also develop new allergies as adults. People with asthma or eczema are more likely to have allergies.

Symptoms

Common symptoms

• Sneezing or a runny nose
• Itchy, watery eyes
• Coughing or wheezing
• Rash or hives
• Stuffy nose or sinus pressure

Symptoms in children

• Eczema or itchy skin rashes
• Frequent cold-like symptoms that last for weeks
• Tummy pain, vomiting, or diarrhea after certain foods
• Difficulty sleeping due to congestion or itching

Symptoms in older adults

• Dry, itchy eyes
• Persistent cough or breathlessness
• Tiredness from poor sleep
• Skin rashes that take longer to heal

Causes

Main causes

• Pollen from trees, grasses, or weeds
• Dust mites in bedding and upholstery
• Pet dander from cats, dogs, or other animals
• Mold indoors or outdoors
• Insect stings from bees, wasps, or other insects
• Certain foods, such as peanuts, tree nuts, or shellfish

Risk factors

• Family history of allergies, asthma, or eczema
• Personal history of asthma or eczema
• Being exposed to allergens at work (for example, flour or latex)
• Living in an area with high pollen or air pollution

When to see a doctor

See a doctor urgently if:

• If you ever have trouble breathing, swelling of your face or throat, dizziness, or fainting, call your local emergency number immediately. These can be signs of a severe allergic reaction, called anaphylaxis.
• If your child has symptoms after eating a food and seems unusually sleepy or coughs and wheezes, seek emergency help right away.

Book a routine appointment if:

• If allergy symptoms like sneezing, itching, or a rash keep coming back and affect your daily life
• If you do not know what triggers your symptoms and you want to find out
• Before you change your diet or stop taking a medicine because of a suspected allergy

Diagnosis

To diagnose an allergy, your doctor will start by asking about your symptoms, your medical history, and any patterns you have noticed. They may then recommend allergy tests to confirm which allergens are causing your symptoms. This is a good time to ask your own questions, such as: Why is this test recommended? What will happen during the test? Are there any risks? What should I do before the test? When will I get the results, and who will explain them to me?

Tests that may be done

• Skin prick test: a small drop of allergen is placed on your skin and the skin is lightly pricked to see if it reacts
• Specific IgE blood test: a blood sample is checked for allergy-related antibodies
• Patch test: sticky patches with allergens are placed on your skin for a day or more to study delayed reactions

What to expect at your appointment

Allergy tests are usually done in a clinic or hospital. For a skin test, your arm or back may be lightly scratched. For a blood test, a small sample is taken from your arm. You may need to stop certain allergy medicines before the test, but never stop any medicine unless your doctor tells you to. The test itself may feel a little uncomfortable but it is quick. Ask the doctor or nurse to walk you through each step and to tell you how to manage any reactions that might happen.

Treatment

Treating allergies mainly involves avoiding your triggers and managing symptoms when they happen. The exact plan depends on which allergens affect you, how severe your symptoms are, and what you prefer. Your doctor can work with you to create a personal allergy action plan.

Self-care at home

• Learn what you are allergic to and avoid those triggers as much as possible
• Keep windows closed during high pollen season and change clothes after being outside
• Use pillow and mattress covers to reduce dust mites
• Wash bedding in hot water each week
• Rinse your nose with a salt-water solution (saline) to help clear allergens (ask your pharmacist for advice)

Medical treatments

For many people, allergy medicines help control symptoms. These include antihistamines (which block the effects of histamine), nasal sprays, and eye drops. In some cases, your doctor may suggest immunotherapy, also called allergy shots or tablets. This treatment slowly builds your tolerance to an allergen over time, often over several years. Before starting any treatment, ask your doctor to explain how it works, how long it takes, and what side effects to watch for.

When is surgery considered?

Surgery is not a treatment for allergies. Allergy management focuses on avoiding triggers, using medicines, and, for some people, immunotherapy.

Living with this condition

Living with allergies often means making small changes to your routine. Keep a detailed record of your symptoms and what you think triggers them. Share this with your doctor. Read labels carefully, as allergens like food or latex can be hidden in everyday items. Carry your emergency plan and any medicines your doctor has recommended, including an emergency injector if one has been prescribed.

Lifestyle tips

• Plan outdoor activities around the pollen forecast
• Vacuum and clean your home regularly to reduce dust and pet dander
• Shower and change clothes after being outside on high-allergy days
• Talk to your employer or school about allergy-friendly changes, if needed

Diet and exercise

A balanced diet and regular exercise support overall health and may help you feel better overall. If you have a food allergy, follow the advice of your dietitian or doctor. Exercise can sometimes make allergy symptoms worse, especially in cold air or on high pollen days, so adjust your routine accordingly and ask your doctor if you need a plan for exercise-related symptoms.

Mental health and emotional wellbeing

Allergies can be frustrating and even frightening, especially if you worry about severe reactions. Feeling anxious, stressed, or low about your allergies is completely understandable. It may help to talk about your feelings with a trusted person or a mental health professional. If your anxiety affects your daily life, let your doctor know.

Prevention

You cannot always prevent allergies from developing, especially if they run in your family. However, you can reduce your symptoms by avoiding known triggers and by following your treatment plan. For some, allergy immunotherapy may reduce the sensitivity to certain allergens over time.

Vaccines

There is no general vaccine that prevents allergies. But allergy immunotherapy (allergy shots or tablets) works in a similar way by training your immune system to be less sensitive to a specific allergen. Ask your allergy specialist if this is right for you.

Screening programmes

Screening for allergies is not done routinely. Your doctor may suggest allergy testing if you have symptoms that suggest an allergy, or if you have a condition like severe eczema that is linked to allergies. Always discuss the reasons for testing with your doctor.

Complications

If left untreated

• Severe allergic reactions (anaphylaxis), which can be life-threatening
• Sleep problems, tiredness, and headaches from long-term congestion
• Poor asthma control, with more wheezing and breathing problems
• Skin infections from scratching eczema or rashes

Long-term outlook

With the right care, most people with allergies manage their symptoms very well. Allergy testing can give you clear answers and help you take control. Many people lead active, full lives and enjoy the same activities as everyone else. It is important to work with your healthcare team and ask questions whenever you are unsure.

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