How to patch test new skin care products

Posted by The K Shop on

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Not only sensitive skin types, but everyone should do a patch test to new skin care products to make sure it won't create any breakout and/or cause allergic reactions.

Repeat this: Always, always patch test new skin care before slathering.

Here's why: Even if your skin is not sensitive, certain formulations or ingredients can irritate even normal skin types. This can result in red and angry rashes, or dry, itchy and flaky skin. Not only irritated skin, products with thick and heavy emollients like coconut oil can also cause unwanted breakout-related reactions like clogging and acne.

Patch testing for irritation/ allergic reactions

To do an allergy patch test, simply apply a small amount of the product to a small area of your face that's easily covered—such as the underside of your jaw, a corner of your forehead, behind your ear or the side of your neck. There should be no other products on the skin so that you can properly test this product. Wait around 48 hours to see if you have a reaction.

If you got a little excited and have already rubbed the new serum all over your face, don’t worry. When you feel or see any redness, itching or discomfort, just wash your skin with a gentle cleanser, then follow up with your go-to moisturizer. You can also treat the affected area with a soothing product, such as Holika Holika Aloe 99% Soothing Gel - a soothing gel containing 99% aloe vera leaf juice from Jeju that calms the reddened and sensitive face and body. 


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