To diagnose an allergy, the first thing your doctor does is talk with you. Hell discuss your symptoms, any medications youre currently taking, and your personal and family history. A physical examination is also necessary.
The next step is the tests. There are 3 types of tests. The skin test, patch test or blood test.
The skin test is the most common test used. Its generally the most accurate and certainly the least expensive. With the skin test, a small amount of an allergen is put on your skin and then the spot is pricked or scratched with a needle. You can also have a little bit of the allergen injected into the outer layer of your skin.
If you have an allergy to the substance that was used, youll have swelling, redness and itching in the tested spot within 20 minutes.
The patch test is used to diagnose contact dermatitis. A small amount of allergen is put on your skin and covered with a bandage. Your doctor will check the spot in 48 hours to see if youve developed a rash.
The third type of test is the blood test. This may be used if you have a skin condition or if youre taking some type of medication that might interfere with a skin...
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