The rash that develops from something you've touched is called contact dermatitis. Sometimes the cause is evident. Other times it is advisable to undergo "patch testing" to determine the cause of contact dermatitis.

In patch testing, bandaid-like strips containing possible allergens are applied to your back and kept in place for three days. The patches must be kept dry. Physical exertion which causes perspiration should be avoided.

sponge baths are suggested. If the test sites itch unbearably, call the office and the patches will be removed ahead of schedule.

When patch tests are removed, the nurse will mark the areas with a special invisible ink. Twenty or thirty minutes after removal, the results will be interpreted.

Allergy-causing agents will be determined and discussed. If you have questions concerning your contact dermatitis, please call the office at any time.

POINTS TO BE OBSERVED

1. Leave the patch in place until it is removed in our office.

2. In order to prevent false test results, during the entire testing period you should not shower, wash your back, or allow the sun or ultraviolet light to shine on it. Gentle washing is permitted, provided that the patches are kept dry.

3. Please try to avoid strenuous physical activities that could make you sweat, as well as movements that could cause the patches to come off.

4. If one or several of the patches loosen at some time during the test, fasten them with additional adhesive tape in exactly the same place (and inform us).

5. If you feel some minor itching, this is normal and sometimes occurs when the test is positive. Please do not scratch.

6. If you feel a severe burning sensation at the test site, contact our office.

7. Please return on the scheduled dates for the interpreting of your test results. In some cases an additional reading may be required.

8. Should you be allergic to one or more of the substances tested, a redness or itchy rash will appear on the corresponding test area. The substances producing these skin reactions could be the cause of your allergy. Redness and itching from the test usually disappear after a few days.

Should you notice additional reddening or skin changes which appear unexpectedly within a period of three weeks after removal of the test sites report these to the office.