Best Allergy Test in Jaipur, Rajasthan, India | AsthmaBhawan 

An allergy is present when a person’s immune system attacks a substance (called an allergen) that most people’s immune systems would ignore.

Skin pricks multi-tester device, intra-dermal skin tests with both early and late phase reading, skin patch tests and blood testing.

In 1873 Dr. Charles Blackley performed first skin test by scratched a small amount of grass pollen on his skin & produced a small hive like reaction at the test side.

In skin prick test, aqueous extracts (liquid dose) of potential allergens are injected into the skin. After 10-15 minutes, a wheal or swelling appears at the site of the prick. Positive allergens are those where the swelling is more in comparison to the histamine wheal.

Sometimes, an anomalous situation arises when the skin prick test is positive, but the patient does not have any problem with that allergen in real life.

Therefore, an allergen is considered important in the induction of the disease, only when it causes both skin-positive reaction and induction of allergic disease.

At present there are three types of skin tests as mentioned below:

It is possible to detect allergies with blood test known as RAST, PRIST and FAST tests.

In these tests sample of blood is processed through an analyzer to see if the blood contains allergic IgE antibodies to certain allergens.

These tests are very helpful when a doctor cannot perform skin test because of a skin eruption or a patient’s fear of needle or when there is a chance of inducing an allergic reaction with skin test.

Allergy blood test has three major disadvantages:

Results are not available until two or three weeks after the test.