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Testing for allergies: Blood test

Professionally updated: March 4, 2025

Allergy is a common disorder in which the body's immune system reacts abnormally to normally harmless substances. Symptoms vary widely and can include skin rashes, itching, sneezing and asthma. Understanding allergies is the first step towards effective prevention and treatment.

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Jakob Fraes
Specialist in General Medicine, PhD
Read more about Allergy blood test. Everything you need to know.

Causes of allergies

An allergy occurs when the immune system mistakenly identifies a harmless substance as a threat and reacts with an inflammatory response. The reasons why some people develop allergies are complex and multifactorial, including genetics, environment and lifestyle.

Symptoms of allergies

The symptoms of allergies are varied and depend on which organ is affected. They can include itchy eyes, runny nose, rash, swelling or asthma attacks. Identifying and understanding your specific symptoms is key to effective treatment and relief.

Diagnosis of allergies

To diagnose allergies, your doctor will take a thorough medical history, possibly followed by tests such as skin prick tests, blood tests or provocation tests. An accurate diagnosis is the foundation for effective and targeted treatment of your allergy symptoms.

Allergy treatment

Allergy treatment aims to relieve symptoms and, if possible, eliminate the underlying cause. Treatment options include medication, allergy vaccinations, allergen avoidance and advice on lifestyle changes. Your doctor will help you choose the best treatment strategy based on your diagnosis and symptoms.

Allergy prevention

Prevention is an important part of allergy management. This can involve avoiding known allergens, using hypoallergenic products and implementing lifestyle changes to reduce exposure to potential allergy triggers. Early intervention and prevention can significantly improve the quality of life for allergy sufferers.

Book an allergy consultation now!

Are you or someone in your family affected by allergies? Our experienced doctors are ready to help and guide you through your journey from diagnosis to treatment and prevention. Click here to book a consultation and take the first step towards a life with fewer allergy symptoms.

What are the most common allergens?

The most common allergens include pollen, dust mites, mold, animal fur, insect stings, and certain foods such as nuts, shellfish, milk, and eggs.

How are allergies treated?

Treatment for allergies varies and depends on the type of allergy and severity of symptoms. Common treatment options include medication (antihistamines, nasal steroid sprays), allergy vaccinations, and lifestyle advice to avoid allergens.

How can I get my allergy diagnosed?

An allergy diagnosis typically involves a combination of your medical history, symptoms, and various tests such as skin prick tests, blood tests or provocation tests. Consult one of our doctors to start the diagnosis process.

Are allergies hereditary?

Yes, allergies can be hereditary. If both parents have allergies, the likelihood that their children will also develop allergies increases. However, environmental factors also play a significant role.

Can children outgrow their allergies?

Yes, it is possible. Many children outgrow certain food allergies, like milk or eggs, but allergies to nuts, fish and shellfish are often lifelong. Allergies to dust mites, pollen, or mold rarely disappear with age. For proper advice and treatment, consult a doctor.