If you’ve been anywhere near TikTok or YouTube lately, you’ve probably heard people talking about slugging face routines. The name isn’t exactly glamorous. It makes you think of slimy garden pests leaving a trail across your pillowcase.
This is one of the few viral beauty trends that dermatologists actually support. When you understand what slugging is, it makes perfect sense. It's affordable, effective, and you may already own the only product you need.
So, let’s break down exactly what slugging means, why it works, and whether you should be slathering it all over your face tonight.
What Is Slugging? (No, It Doesn’t Involve Actual Slugs)
Slugging skincare is the practice of coating your face in a thin layer of occlusive ointment before bed. The result is skin that looks dewy, plump, and hydrated by morning.
The term slugging comes from the fact that after you apply the product, your face has that same wet, slippery look as a slug trail. It's not a flattering comparison, but the results are hard to argue with.
This technique isn’t new, even though it just blew up online a few years ago. It actually has roots in K-beauty routines, and dermatologists have been recommending similar methods to patients with severely dry skin for decades.
When people talk about slug skin care, they're usually referring to applying a classic drugstore petroleum jelly such as Vaseline or Aquaphor as the final step in their nighttime routine.
How Slugging Works: The Science of Slime
To understand what slugging is doing for your skin, you have to understand how your skin loses water. Throughout the day and night, water evaporates from your skin’s surface.
That’s called transepidermal water loss. When that happens too fast, your skin gets tight, flaky, and irritated.
That’s where slugging comes in. Petroleum jelly is what dermatologists call an "occlusive." That means it sits on top of your skin and forms a physical barrier. It does not add water to your skin. It locks in the water that is already there.
You apply your usual moisturizer or serum, and then you slap on that layer of jelly. It traps moisture underneath, allowing it to absorb into the skin rather than evaporate overnight.
This helps repair your skin barrier and keeps your face hydrated for hours. Studies show that petroleum jelly can reduce transepidermal water loss by up to 98%, making it particularly effective for dry or dehydrated skin.
Who Should (and Shouldn’t) Try Slugging
Slugging works well for many skin types, but it is not right for everyone. You’re a good candidate for slugging if:
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You have dry or dehydrated skin that feels tight after washing.
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You live in a cold or low-humidity climate, where moisture evaporates from skin more quickly.
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Your skin barrier is damaged from over-exfoliating or using too many strong actives.
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You have eczema or rosacea (the dry type, not the acneic type).
Slugging may not be suitable if:
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You have oily skin. Slugging adds a heavy lipid layer that oily skin typically does not need.
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You are prone to acne. While petroleum jelly itself is non-comedogenic (meaning it won’t clog pores on its own), it can trap bacteria, oil, and dead skin cells underneath. If you’re breakout-prone, this can make things worse.
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You have an active skin infection or open wound. Sealing that in could prevent it from healing properly.
How to Slug: A Simple Step-by-Step Guide
Follow these steps to try slug skin care tonight:
1. Cleanse thoroughly. Start with a clean face. Trapping dirt or makeup under the occlusive layer can lead to breakouts. Wash your face with a gentle cleanser.
2. Apply your actives (carefully). Important: Do not use strong exfoliating acids (AHAs/BHAs) or retinoids immediately before slugging, because you’re sealing everything in, you’re also increasing the potency of those ingredients.
This can cause significant irritation, redness, and in some cases chemical burns. If you use prescription retinoids, skip slugging that night, or talk to your derm first.
3. Moisturize. Apply your favorite hydrating moisturizer or a serum with hyaluronic acid. Damp skin absorbs product more effectively, so avoid drying your face completely after cleansing.
4. Slug. Take a pea-sized amount of petroleum jelly. Warm it up between your fingers and pat it onto your skin. Pat it on rather than rubbing it in. You want a thin, even layer that feels slightly tacky.
5. Protect your bed. Keep in mind this product is messy. It will get on your pillowcase. Throw an old towel over your pillow or use a cotton pillowcase you don’t mind washing the next day.
6. Wash it off in the morning. In the A.M., wash your face thoroughly with your regular cleanser to remove any residue.
Final Thought: To Slug or Not to Slug?
At its core, slugging is a straightforward way to lock in hydration and support your skin barrier. For genuinely dry or dehydrated skin, a few nights of slugging can make a noticeable difference in texture and hydration.
If you have oily or acne-prone skin, skip this one. There are gentler ways to boost hydration without the risk of breakouts.
Ready to wake up with glowy, plump skin? Check out our shop for gentle cleansers and hydrating moisturizers to layer underneath your slugging routine. Your perfect nighttime combo is waiting!
