Skin-prick tests and blood tests for specific IgE can both help investigate an allergy, but neither is the best test for everyone. The choice starts with the reaction you experienced and the substances suspected. A larger test package does not necessarily give a more useful answer.
In Sweden, call 112 for a suspected severe allergic reaction with difficulty breathing, swelling affecting the tongue or throat, or faintness. Follow your prescribed emergency plan if you have one. Planned allergy testing must not delay emergency care.
Start with what actually happens
Write down the symptoms, how soon they begin after exposure and whether the same pattern has happened more than once. Include the season, setting, food or substance, and approximate amount where relevant. Photographs of a skin reaction and a current medicine list may help.
For typical nose and eye symptoms that respond to treatment, testing is not always necessary. Ask which uncertainty a proposed test is intended to resolve and how the result would change your care.
Skin-prick test or specific-IgE blood test?
| Question | Skin-prick testing | Specific IgE in blood |
|---|---|---|
| What happens? | Selected substances are tested using small pricks through drops on the skin. | A blood sample is analysed for responses to selected substances. |
| When is it read? | The skin reaction is assessed during the visit. | The result follows laboratory analysis. |
| What affects the choice? | Skin condition and some medicines may affect suitability or interpretation. | May be useful when a skin test is unsuitable; the history still determines which analyses help. |
Tell the service about antihistamines and other treatment before a skin test. Follow its specific instructions; do not stop needed medicines on your own. Ask what to do if symptoms worsen while following the preparation instructions.
A positive result is not the whole diagnosis
A positive test can show sensitisation: an immune response to a substance. The clinician must compare that with what happens when you encounter it. A result on its own does not reliably predict the severity of a future reaction.
Do not remove many foods from your diet solely because they appear on a test report. Suspected food allergy needs a plan for investigation and nutrition. After a serious reaction, do not eat the suspected food at home to see whether a test result is “correct”.
What should a private allergy assessment include?
Request a current, itemised quotation. Confirm whether it covers the initial medical assessment, sampling, each laboratory analysis, explanation of the result and any follow-up. The price of a sample or a panel may not cover all of those steps.
Ask who takes responsibility if the result and your symptoms do not agree. A report that simply labels several substances positive does not provide an exposure plan, a treatment plan or instructions for a future reaction.
Preparing for the appointment
- Bring a timeline of the reaction and any useful photographs.
- List prescribed medicines, non-prescription allergy products and supplements.
- Explain any asthma symptoms or previous severe reaction.
- Ask which substances will be tested and why.
- Agree how you will receive a result and an explanation.
Getting care in Sweden
A vårdcentral can assess many allergy concerns and decide whether specialist investigation is needed. Private routes and fees vary. Call 1177 if you need advice about where to seek care; use 112 for emergency symptoms.
Common questions
Is a blood test always more accurate than a skin test?
No single method is best in every situation. The suspected allergy, your skin, treatment and history affect the choice.
Does a negative test explain every reaction?
No. Discuss persistent symptoms and the original reaction with the clinician. The next step depends on the clinical question, not only the positive or negative label.
Sources and further reading
Sources and links checked on 22 October 2026. Editorial team: Hagakliniken. This is general information and does not replace an individual medical assessment.