How can I tell if a skincare product is irritating my skin?

What does skincare irritation look like?

Contact dermatitis is a skin reaction to an irritant or an allergen. It can look like dry, itchy or cracked skin, raised bumps, swelling, flaky patches, burning, stinging or blisters that ooze. It may also feel sore or painful. A rash can be limited to the area where a product touched your skin, but an allergic reaction can spread beyond that area.245

Color is not a reliable test on its own. On darker skin, an irritated area can look darker than usual, purple, grey or faint pink rather than bright red. Cosmetic allergy commonly affects the face, lips, eyes, ears and neck.235

How can I tell if skincare is the cause?

Compare when the reaction began with when you applied the product. Irritant contact dermatitis can appear immediately or within 48 hours. A cosmetic allergy often takes longer: its rash can develop more than 12 hours after contact and peak around 48 hours. Weaker irritants can take days or weeks of repeated exposure to cause symptoms, so a delayed reaction does not automatically mean allergy.13

Notice whether the affected area matches where the product goes. Some rinse off products, such as shampoo or conditioner, can run onto the sides of the face and neck. A reaction can also appear after years of using a cosmetic without trouble. People with sensitive skin or chronic skin conditions experience contact dermatitis more often, and atopic dermatitis, a type of eczema, can increase sensitivity to irritants.23

Any ingredient can cause a contact reaction, but fragrances and preservatives are common triggers in cosmetics. If fragrance is a known trigger for you, choose a product labelled fragrance free rather than relying on unscented: an unscented product can contain fragrance material to mask another smell. Retinol and glycolic acid can irritate sensitive skin temporarily, so even an ingredient with a useful job still gets no immunity from skin.36

Should I stop using skincare if my face gets irritated?

What should I do if I suspect a product?

1. 1Stop using the suspected product. If you have just applied it and a reaction develops, gently wash it off; do not apply it again to check.
2. 2Use a cool compress or petroleum jelly to relieve the skin if needed.
3. 3Pause other skincare products that irritate the area while it heals. Ongoing irritation can delay healing.

Write down which products you use, when the reaction starts, and where it appears. That gives a clinician useful details if you need help identifying the cause. other skin conditions can look similar.23

How do I test a new skincare product?

Test a new product before adding it to your routine, but do not use a home test to challenge a product that has already caused a reaction. For a product you have not reacted to, dermatologists recommend this small area test:6

1. 1Apply the product twice a day for seven to 10 days to a quarter sized spot on your inner arm or the bend of your elbow. Use the amount and thickness you would normally apply.
2. 2Leave it on for the usual amount of time. If it is a cleanser or another product you normally rinse off, keep it on for five minutes or follow the label directions.
3. 3If you have no red, itchy or swollen skin after seven to 10 days, you can start using the product as directed. If a reaction appears, wash it off and do not use it again.

The test takes seven to 10 days, which is a long committee meeting for a patch of arm. A home test can help predict whether a product will cause a reaction, but it does not identify the exact ingredient responsible for one. A dermatologist can use medical patch testing to help find a trigger when it is difficult to pinpoint.6

How long does skin irritation from skincare last?

The reaction may start within minutes, hours or days, depending on whether it is caused by an irritant or an allergy. After you stop contact with the allergen, allergic contact dermatitis often settles over several days. Mild contact dermatitis can clear within a few days once you avoid the cause, but a rash can take several weeks to go away with treatment. If it is not improving, keeps returning or gets worse, get medical advice.25

When should I see a clinician?

Seek prompt medical advice for a severe reaction or possible infection, such as rapidly worsening symptoms, discharge, increasing pain, or feeling hot, cold or shivery. Get emergency help if you have trouble breathing. See a doctor if symptoms are persistent, recurrent or severe, or if you cannot identify the cause. A dermatologist can assess the rash and may use patch testing to identify an allergy.124