Clarkston Dermatology
1-248-620-3376 5701 Bow Pointe Drive
Suites 215 & 217
Clarkston, MI 48346

Patch Testing

Allergic contact Dermatitis is caused by a reaction to substances called allergens that come into contact with your skin. In some people, these allergens can cause itching, redness, and blistering.

Patch Testing is a procedure performed in our office used in detecting the most common skin allergens including rubber, metal, fragrances, and preservatives. It involves applying 70 of the most common test substances to the skin. Patches are placed in direct contact with the skin, usually on the back. Adhesive tape is used to fix them in place, and the test sites are marked.

The patches are left in place for 48 hours, during which time it is important not to shower, bathe, play vigorous sports or sweat in any way. If the adhesive tapes peel off, the process will have to be repeated and this will not be covered by insurance.

After 48 hours the patches are removed and an initial reading is taken. The final reading is taken a further 24 hours later. The patient should refrain from washing until the last reading is taken.

This can help decide which allergens you are allergic to and identify those that could be aggravating your skin. We will then be able to help determine how you can avoid the allergens.

For best results, patients who are planning on having patch testing completed should not take antihistamines at least 1-2 weeks before their testing begins. Patients should also not take any antihistamines or steroids while the testing is in progress.

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