"Slugging" The Slippery Truth About Slugging: A Medical Esthetician’s Verdict

If you’ve spent more than five minutes on TikTok lately, you’ve probably seen influencers slathering their faces in Vaseline before bed, promising you’ll wake up looking like a freshly glazed donut. They call it "slugging."

As a medical esthetician, I watch these viral trends with equal parts fascination and sheer terror. Suddenly, everyone thinks smearing petroleum jelly all over their face is the ultimate skincare cure-all. So, let’s debunk this right now. Is slugging a miracle moisture hack, or is it a terrible idea?

The short answer: It can be both. Let’s get into the science of it.

What is Slugging Actually Doing?

To be clear, petroleum jelly and similar heavy ointments do not actually add moisture to your skin. They are "occlusives." This means they sit on top of the skin like a physical barrier, sealing everything underneath it and preventing transepidermal water loss (TEWL). You are essentially shrink-wrapping your face.

When Slugging is Actually Good

I’ll give the internet this one: if your skin is bone-dry, peeling, or your skin barrier is completely compromised from going a little too crazy with harsh scrubs, an occlusive can be a temporary lifesaver. It locks in your hydrating serums and gives your barrier a safe, sealed environment to repair itself.

When Slugging is an Absolute Disaster

Here is where the trend falls apart. Skincare is not one-size-fits-all, and if you have oily, acne-prone, or congested skin, slugging is a one-way ticket to Breakout City. You are essentially creating a greenhouse on your face. Trapping all your natural sebum, dead skin cells, and any lingering bacteria under a thick layer of grease will clog your pores faster than you can say "viral trend."

The Real Danger: Trapping Your Actives

This is the most important takeaway, and the part the internet often conveniently forgets to mention.

Do not ever slug over active ingredients.

If you apply a retinoid, a chemical exfoliant (like an AHA or BHA), or a potent vitamin C serum, and then seal it in with a heavy occlusive, you are driving that active ingredient deeper into the skin and intensifying its potency. This is a fantastic way to wake up with severe irritation, redness, and essentially a chemical burn. If you are going to slug, do it only over a simple, hydrating moisturizer.

The Med Spa Verdict

Congratulations, the internet has simply rediscovered what our grandmothers were doing with Vaseline decades ago. It’s a completely valid technique for specific, dry skin conditions, but it is an absolute nightmare for acne-prone skin or anyone using a heavy-hitting anti-aging routine.

Stop taking medical aesthetic advice from a 20-year-old influencer doing a 12-step routine in their bathroom. If you want to know what your unique skin actually needs to look its best, it’s time to see a professional.

If you are in the Osprey Nokomis or Venice Sarasota area, come see us at Skin Secrets Medical Spa. We’ll assess exactly what your skin needs—and what trends you should definitely skip. eskinsecrets.com Text me @ 212.470.4203