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Testing for allergies: Blood test

Professionally updated: January 12, 2026

Allergy is a common condition where the body's immune system reacts abnormally to normally harmless substances. The symptoms vary widely and can include skin rashes, itching, sneezing, and asthma. Understanding allergy is the first step toward effective prevention and treatment.

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Jakob Fraes
Specialist in General Medicine, Ph.D.
Read more about Allergy blood test. Everything you should know.

Causes of allergy

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 allergy

The symptoms of allergy are varied and depend on which organ is affected. They may 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 allergy

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

Allergy treatment

The goal of allergy treatment is to alleviate symptoms and, if possible, eliminate the underlying cause. Treatment options include medication, allergy shots, avoiding allergens, 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 managing allergies. This may involve avoiding known allergens, using hypoallergenic products, and making 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 dander, insect bites, and certain foods such as nuts, shellfish, milk, and eggs.

How are allergies treated?

The treatment of allergies varies and depends on the type of allergy and the severity of symptoms. Common treatment options include medication (antihistamines, nasal steroid sprays), allergy shots, 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 diagnostic process.

Is allergy hereditary?

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

Can children outgrow their allergies?

Yes, it is possible. Many children outgrow certain food allergies, such as 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.