patch test

Do a patch test before using dye on your hair.

Try a patch test first, being sure to expose the area to the sun.

One type - a patch test - is shown here.

Almost all hair dye products include instructions for doing a patch test.

Patch testing can be performed for identification of the cause.

Consider patch testing a small area prior to dying your whole head.

These controls were administered a patch test of the same preparation.

This can be discussed during the final evaluation of the patch test procedure.

The patch tests were extended to include 26 individuals with no history of allergies.

A patch test is frequently recommended, as per manufacturer's directions.

And to prevent sensitivity reactions, do a patch test before using a new sunscreen.

Do a patch test by applying a thin layer to a small area of your forearm.

In general, it takes 2 to 4 days for a response in patch testing to develop.

The patch test is really just induction of a contact dermatitis in a small area.

Getting the back wet during patch testing should be avoided (no shower).

Be sure to do a patch test for allergic reactions before applying the dye to your hair.

If the suspicion is high in spite of negative patch testing, further investigation might be required.

In one study, volunteers submitted to patch testing, which produced skin irritation.

Patch testing needs to be done to verify which type of chemical triggers the reaction.

Often, patch testing for food allergies is not necessary, but in selected individuals it may be helpful.

Patch testing helps identify which substances may be causing a reaction in a patient.

Allergic sensitivity to quaternium-15 can be detected using a patch test.

Patch testing is used for patients who have chronic, recurring contact dermatitis.

This can be accomplished by having patch tests, a method commonly known as allergy testing.

Dermatologists may refer patients with suspected food allergies for patch testing.