Short answer. Stop a skincare product if it stings, burns or tingles, or if your skin turns red, itchy or swollen (AAD). If there is no reaction, give it time. The American Academy of Dermatology (AAD) says most anti-aging products take at least six weeks to work, and some take up to three months (AAD).
Add the products on your shelf to Oleah, then let the morning face scan be the record. Look at the day 3 check-in, the day 7 report and the day 14 report, instead of one mirror glance.
Published 30 October 2026. Last updated 30 October 2026. Sources checked 24 October 2026. Written by the Oleah team from the sources listed below.
When should you stop a product straight away?
When it reacts with your skin. The AAD says to stop using a product that stings, burns or tingles, because these sensations mean the product irritates your skin (AAD). It also says that if you get red, itchy or swollen skin, you should gently wash the product off and not use it again (AAD).
If a dermatologist prescribed the product, ask them before you stop. The AAD notes that some prescription-strength products will burn or sting (AAD).
How long should you give a product before you stop?
Longer than most people think. The AAD gives these figures, each for a different kind of product.
| Product type | What the AAD says | Source |
|---|---|---|
| Most anti-aging products | At least six weeks, sometimes up to three months | AAD |
| A moisturiser on fine lines | Can plump them up in a few days | AAD |
| An acne product | Some improvement in 4 to 6 weeks, and two to three months or longer to see clearing | AAD |
These are the AAD's figures for those product types. They are not a promise for any one bottle.
What do dermatologists say?
"If you try new skin care products too often, you may not see any progress." American Academy of Dermatology, Dermatologist-recommended skin care for your 20s, updated 23 February 2023
For your routine, this means one change at a time, and enough time before you judge it.
Do skincare products expire?
Some do and some do not have a date. The US Food and Drug Administration (FDA) says no US law requires cosmetics to carry an expiration date (FDA). It says sunscreens and acne products are drugs under US law. Drugs must carry expiration dates. The NHS says to check that sunscreen is not past its expiry date (NHS).
How can you tell a product has gone off?
The FDA lists changes that happen as products break down (FDA):
- A mix of water and oil can separate.
- A product can dry out, harden or crack.
- Heat, sunlight and air can change the colour, texture or smell.
The FDA also says manufacturers usually recommend throwing mascara away two to four months after purchase.
How do you decide what to keep?
- Stop anything that reacts. Stinging, burning, redness, itching or swelling is the signal to stop.
- Check the date and the look. Put aside anything past its date, separated or smelling different.
- Add the products on your shelf to Oleah. Then let the morning face scan be the record. Look at the day 3 check-in, the day 7 report and the day 14 report, instead of one mirror glance.
- Change one thing at a time. Keep the rest of the routine the same while you judge one product.
- Give it the time its type needs. Use the AAD figures above as a guide, not a deadline.
For the next step, read should you upgrade a skincare product you already use and how to know if skincare is working.
If a product stings, burns or makes your skin red, wash it off and stop using it. If a doctor prescribed it, ask them first. If your skin stays sore, see a pharmacist or doctor. If it blisters or swells, see a doctor today. If your lips, tongue or throat swell, or you have trouble breathing, call emergency services now. Oleah is not a doctor and does not give medical advice.
How to check this on your own shelf
Oleah is an iPhone app for the skincare you already own. You add the products on your shelf or in your routine, and each morning you take a quick face scan that takes about 30 seconds. Oleah can flag products on your shelf that may not belong together. There is a check-in on day 3, a report on day 7 and a report on day 14. Oleah is not a doctor and does not give medical advice.
Download the free iPhone beta. Add the products on your shelf, then take a quick face scan in the morning.
Questions people ask
How do I know when to stop using a skincare product? Stop if it stings, burns or tingles, or if your skin turns red, itchy or swollen. The AAD gives both signs.
How long should I try a skincare product before giving up? The AAD says most anti-aging products take at least six weeks, and sometimes up to three months.
Do skincare products expire? Not all carry a date. The FDA says US law does not require one on cosmetics, but sunscreens and acne products are drugs and must have one.
Should I stop a product my dermatologist prescribed if it stings? Ask your dermatologist first. The AAD notes some prescription-strength products will burn or sting.
Sources
- American Academy of Dermatology, "How to maximize results from anti-aging skin care products". https://www.aad.org/public/everyday-care/skin-care-secrets/anti-aging/maximize-anti-aging-products. Accessed 24 October 2026.
- American Academy of Dermatology, "How to test skin care products". https://www.aad.org/public/everyday-care/skin-care-secrets/prevent-skin-problems/test-skin-care-products. Accessed 24 October 2026.
- American Academy of Dermatology, "9 things to try when acne won't clear". https://www.aad.org/public/diseases/acne/diy/wont-clear. Accessed 24 October 2026.
- American Academy of Dermatology, "Dermatologist-recommended skin care for your 20s", updated 23 February 2023. https://www.aad.org/public/everyday-care/skin-care-basics/care/skin-care-in-your-20s. Accessed 24 October 2026.
- US Food and Drug Administration, "Shelf Life and Expiration Dating of Cosmetics". https://www.fda.gov/cosmetics/cosmetics-labeling/shelf-life-and-expiration-dating-cosmetics. Accessed 24 October 2026.
- NHS, "Sunscreen and sun safety". https://www.nhs.uk/live-well/seasonal-health/sunscreen-and-sun-safety/. Accessed 24 October 2026.
Oleah tracks how your skin looks. It is not a medical device. See a doctor about skin conditions.
