3 Common Slugging Mistakes This Derm Says You Shouldn't Ignore

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April 10, 2022 — 13:05 PM

We’ve talked about slugging a few times over here, but as more and more people begin to participate in the practice, it’s important to go over a few mistakes to avoid when lathering your final goopy layer. 

As a quick refresher: Slugging entails applying an occlusive moisturizer as the last step in your skin care routine to lock in hydration and prevent transepidermal water loss. Most people reach for petrolatum-based products, but there are other, more eco-friendly options as well.

Recently, board-certified dermatologist Lindsey Zubritsky, M.D. FAAD made a super quick (and extremely helpful) “slugging dos and don’ts” TikTok video to give her followers the facts, and we’re going to share a few of those tips today. This way, you, too can reap the wonderful benefits of slugging without any of the potential downsides. Here are three mistakes you may be making while slugging and how to avoid them. 

While slugging is a great practice for locking in ultra-hydrating ingredients, like hyaluronic acid or niacinamide, it doesn’t play so well with stronger actives. Occlusive moisturizers trap everything underneath, and nothing is getting past that final layer—and trapping in those heavy-duty actives is a recipe for irritation. In fact, Zubritsky notes this process can make the active even stronger. While you may want all the extra hydration you can get from your HA serum, you probably shouldn’t try to level up your retinoids, as they’re already incredibly strong formulas. 

This doesn’t mean you can’t slug at all if you use a retinoid; just don't use the two on the same night. If you’re wondering how to cycle through your actives and occlusives, you may want to opt for this derm-approved skin cycling method. 

As we explained above, occlusive moisturizers trap whatever is on your skin underneath the moisturizing layer. So if you’re experiencing breakouts, you definitely don’t want to lock in the bacteria and oil coming from your pimples. Instead, reach for a non-comedogenic moisturizer to ensure your skin is adequately hydrated without further clogging the pores. 

And if you are facing some pretty consistent breakouts, you may want to reconsider slugging altogether. To be frank, slugging isn’t recommended for those with oily or acne-prone skin at all; even if you use a non-comedogenic product, such an occlusive environment can trap dead skin and oil and cause acne to thrive. 

If you’re experiencing breakouts in some areas but dry patches in another (classic combination skin struggle), then you may be able to slug over your dry skin, but just be sure the goop doesn’t cover your breakouts. 

Not everyone needs a morning cleanse. If you have extremely dry or sensitive skin, limiting your cleansing to once daily may actually help your skin hold onto some of the moisture you do have. But if you’re choosing to slug at night, that a.m. cleanse is a necessity. Like we said, occlusive moisturizers have the potential to clog your pores, and they essentially put a seal over your skin. This is great for a few hours or overnight, but it shouldn’t go into the next day—especially if you choose to layer on makeup. 

As a best practice, rinse off all the slimy residue with a gentle cleanser to ensure you have a clean, bare canvas for your subsequent skin care and/or makeup products.