According to celebrity estheticianRenee Rouleau, the difference between the two is a matter of severity.

When it happens within this context, its a good thing.

This includes glycolic, lactic, malic, or salicylic acid, says Rouleau.

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They work by lowering the skins pH, so a stingle can be expected as they do so.

Take that as a good sign.

Sometimes an acid product that stingles at first use will go away over time, she says.

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esthetician and founder of Renée Rouleau Skincare

Never fall prey to the common myth that if you dont feel it, its not working.'

Sometimes, though, your skin care can stingle for not-so-great reasons.

You may also notice other symptoms, such as redness.

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Black hair woman wearing a grey and white bra giving herself a deep cleansing session with a face brush and Gatineau skincare face wash lotion, after her shower. Studio skincare portrait over isolated background.

A curvy woman applying cleansing balms and smiling to her reflection in the mirror.

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