Skip to main content

Houston Dermatology

Benefits and Risks of Patch Testing

Comprehensive patch testing may detect more relevant allergens than traditional screening tests.

Patch testing is the test of choice when testing for contact allergens that cause skin reactions.

With patch testing, it's expected that the patient will experience skin reddening and itching at several testing sites. This indicates a positive result. However, there are some risks and side effects of patch testing that may include:

  • Blistering at sites with positive results
  • A reaction that may continue for up to a month
  • Eczema at the testing sites, for those who have had eczema in the past
  • An increase or decrease in the pigment of the skin where patches are placed, which may last for months or permanently
  • An infection at the testing sites (rare)


If you have unexplained dermatitis and would like more information on patch testing at Kelsey-Seybold's Tanglewood Clinic, please con​tact us.


Use your secure patient portal to book appointments online.
What is MyKelseyOnline?​

Log In

​​​​​​​​​​​​By Phone

Our Contact Center is here to serve you, 24 hours a day, 7 days a week.