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Allergists online in Spain

Book an online consultation with Allergists. Discuss your symptoms or follow up on your treatment online.

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Tomasz Grzelewski

Dermatology 21 years exp.

Dr Tomasz Grzelewski is an MD, PhD specialist in allergy, paediatrics, general practice and sports medicine, with a clinical focus on dermatology, endocrinology, allergology and sports-related health. He has more than 20 years of clinical experience and completed his medical training at the Medical University of Łódź, where he defended his PhD thesis with distinction. His doctoral research was recognised by the Polish Society of Allergology for its innovative contribution to the field. Throughout his career, he has gained extensive expertise in diagnosing and managing a wide range of allergic and paediatric conditions, including modern allergen desensitisation techniques.

For five years, Dr Grzelewski served as the Head of two paediatric departments in Poland, managing complex clinical cases and leading multidisciplinary teams. He also worked in medical centres in the United Kingdom, gaining experience across both primary care and specialist environments. With over a decade of telemedicine experience, he has provided online consultations across Europe and is valued for his clear, structured and evidence-based medical guidance.

Dr Grzelewski is actively involved in clinical programmes focused on modern anti-allergic therapies. As a Principal Investigator, he leads research projects on sublingual and oral allergen desensitisation, supporting evidence-based progress in allergy treatment for both children and adults.

In addition to his background in allergology and paediatrics, he completed dermatology studies through the Cambridge Education Group (Royal College of Physicians of Ireland) and a Clinical Endocrinology course at Harvard Medical School. This advanced training enhances his ability to manage skin manifestations of allergies, atopic conditions, urticaria, endocrine-related symptoms and complex immunological reactions.

Patients commonly seek his care for:

  • seasonal and perennial allergies
  • allergic rhinitis and chronic nasal symptoms
  • asthma and breathing difficulties
  • food and medication allergies
  • urticaria, atopic dermatitis and skin reactions
  • recurrent infections in children
  • sports-related health questions
  • general family medicine concerns
Dr Tomasz Grzelewski is known for his clear communication style, structured medical approach and ability to explain treatment options in a concise and accessible way. His multidisciplinary background across allergy, paediatrics, dermatology and endocrinology allows him to provide safe, up-to-date and comprehensive care for patients of all ages.
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Allergists for allergic symptoms and immune reactions

What allergists treat, which allergy-related symptoms lead to a consultation, and when ongoing care is needed

What an allergist does

What an allergist does

An allergist specialises in conditions caused by abnormal immune responses to otherwise harmless substances. These include environmental, food, drug, and insect-related allergens.

Allergic reactions can affect the skin, respiratory system, digestive tract, and overall wellbeing. Symptoms range from mild and intermittent to persistent or severe.

People consult an allergist when symptoms recur, worsen over time, or interfere with daily life. In many cases, allergic conditions develop gradually and are not immediately recognised.

Allergology often involves long-term management. Many allergic conditions require monitoring and adjustment rather than a single consultation.

An allergist also helps determine whether symptoms are truly allergy-related or caused by other conditions with similar presentations.

Common allergy symptoms and reasons to book

Common allergy symptoms and reasons to book

Nasal symptoms such as sneezing, congestion, runny nose, or itching are common reasons to seek allergy care, especially when persistent or seasonal.

Skin reactions, including rashes, itching, redness, or recurrent hives, frequently lead to allergology consultations.

Respiratory symptoms such as coughing, wheezing, chest tightness, or shortness of breath may be related to allergic triggers and require evaluation.

Digestive symptoms, including abdominal discomfort, nausea, or reactions after eating specific foods, can also be allergy-related.

Eye symptoms like redness, tearing, or itching often occur alongside other allergic manifestations.

Chronic allergic conditions and long-term care

Chronic allergic conditions and long-term care

Many allergic conditions are chronic. Allergic rhinitis, asthma linked to allergies, chronic urticaria, and food allergies often require ongoing care.

Long-term management focuses on identifying triggers, controlling symptoms, and reducing the frequency and severity of reactions.

Medication management is an important part of allergology. Treatment plans may need adjustment based on symptom patterns and exposure.

Some allergies remain stable, while others change over time. Regular follow-up helps adapt care as needed.

For people relocating to new environments, exposure to new allergens can make consistent allergology care especially important.

Allergology assessment and diagnosis

Allergology assessment and diagnosis

An allergology consultation involves structured clinical evaluation. The allergist reviews symptoms, their timing, triggers, and severity.

Medical history, family history, and previous reactions play an important role in assessment.

Many allergic and non-allergic conditions present with similar symptoms. Specialist evaluation helps clarify the underlying mechanism.

Assessment also determines risk level. Some cases require monitoring, while others need active intervention.

Accurate diagnosis supports safe and effective allergy management.

When allergology may not be enough

When allergology may not be enough

Although allergology covers a wide range of immune-related reactions, some situations require urgent care. Severe allergic reactions, rapid swelling, breathing difficulties, or systemic symptoms need immediate medical attention.

Allergists also identify when symptoms are better managed by other specialists, depending on the underlying cause.

Some immune reactions may be part of broader systemic conditions and require multidisciplinary evaluation.

Recognising these limits is part of responsible allergy care.

Knowing when to seek allergology care and when urgent help is needed is essential for patient safety.

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Allergists: frequently asked questions

Answers to common questions about allergology, allergic symptoms, and when to see an allergist

What conditions does an allergist treat?
Allergists treat conditions related to allergic and immune reactions, including respiratory, skin, food, and drug-related allergies.
When should I see an allergist?
When allergy symptoms persist, recur, or interfere with breathing, skin comfort, or daily activities.
Do allergists manage long-term conditions?
Yes. Many allergic conditions require ongoing monitoring and symptom control.
What symptoms commonly lead to allergology consultations?
Nasal congestion, sneezing, skin reactions, breathing symptoms, digestive reactions, and eye irritation.
Do allergists manage medication?
Yes. Medication assessment and adjustment are central to allergy care.
Is allergology only for severe allergies?
No. Allergists also evaluate mild or early allergic symptoms.
When is urgent care needed instead of allergology?
Severe reactions, breathing difficulty, rapid swelling, or systemic symptoms require immediate medical attention.
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