A 50-year-old member asked:
How much time does a allergic reaction to hair dye take to occur?
1 doctor answer • 1 doctor weighed in
Dr. Jay Kashkinanswered
Allergy and Immunology 40 years experience
24-96 hours: Contact reactions to hair dye are similar to that of poison ivy although the distribution is usually limited to the scalp, neck, shoulders and sometimes upper chest. It falls under the category of a type IV hypersensitivity reaction. This is different than a reaction to pollen or pets which cause immediate symptoms ( minutes to a few hours) called a type I reaction. It appears in 24-96 hours.
Created for people with ongoing healthcare needs but benefits everyone.
3.5k viewsAnswered >2 years ago
Last updated Mar 16, 2018
People also asked
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $44!
50% off with $19/month membership
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.