Allergy testinghelp and confirm the diagnosis
Allergy tests can confirm the diagnosis and determine what substance the body’s reaction. The aim is to prevent and treat allergy effectively at the right time.
WHY YOU REALIZE THIS REVIEW?
The answer is to find an allergic cause eye respiratory disease (rhinitis, asthma), (conjunctivitis) or skin (eczema, hives). A hospital or in the office, the allergist will try, first, to identify the agents responsible for your troubles by specific questions. Then he tested allergens on your skin and examine your reactions.
What precautions before?
Do not take antihistamine one week before testing, or paracetamol, anti-inflammatory, anxiolytic, antidepressant or sleeping pill two days in advance; these drugs distort the results.
HOW’S IT GOING?
You sit and allergy skin tests will be tailored to your needs.
– The skin prick test is the most widely used technique. It relates to environmental allergens (dust mites, pollens, animal dander, mold, food …). In practice, a drop of each allergen is placed on the forearm and the doctor pricks through the drop.
To avoid misinterpretation, the allergist makes a positive control and a negative control. The positive control causes a central button and redness. The negative control should not cause any reaction. The reading is made after twenty-five minutes. The size of the button and redness are compared to the positive control and interpreted as a specific or non-allergic response.
– The skin test or injection of the allergen under the skin is used to study the sensitivity to certain allergens. Reading of the result is immediate (after twenty-five minutes) or delayed forty-eight hours in some cases.
– The patches are stuck in the back and explore the cutaneous manifestations, such as eczema or urticaria, and conjunctivitis due to some contact reaction (eg, lentils, decontaminating, drops …). Playback is thirty-six to seventy-two hours.
Is it painful?
No, you just feel a slight sting with the prick test and intradermal.
How do you feel after?
It makes you itch locally in case of positive feedback (if you react to products), but the feeling does not last. So avoid scratching!
When do we get the results?
The final reading of the tests is, as appropriate, at the end of the consultation or a few days later.
WILL HE RISK AND CONS-INDICATIONS?
In most cases, the tests do not cause problems. Some allergens (such as food or wasp venom …) can cause a general reaction, the doctor will then take precautionary measures.
DISEASES AND DISORDERS SOUGHT
Hay fever (allergic rhinitis)