What Is Slugging and Should You Be Doing It to Your Skin

The modern skincare landscape is flooded with complex, multi-step routines and expensive, high-tech formulations. Yet, one of the most significant and enduring phenomena in the beauty world relies on a humble drugstore classic that costs only a few dollars. This practice is known as slugging.

While the term sounds unappealing, the method has taken social media by storm and received substantial backing from dermatologists. To understand whether this technique belongs in your nighttime ritual, it is essential to look at the science of the skin barrier, the mechanics of occlusive ingredients, and how different skin types react to heavy topical sealants.

Understanding the Concept of Slugging

Slugging is the practice of slathering the face with a heavy, petrolatum-based occlusive ointment as the final step of a nighttime skincare routine. The goal is to leave a thick, glossy, and shiny coating on the skin overnight. This ultra-shiny finish resembles the slimy trail left behind by a slug, which is exactly how the technique earned its memorable name.

Although the term gained massive traction through global beauty platforms and Korean beauty trends, the fundamental practice is far from a modern invention. Generations of Black and Brown families have utilized petroleum jelly for decades to protect their skin from harsh winter weather, soothe dryness, and maintain a radiant complexion. Furthermore, dermatologists have used occlusive therapy for generations to heal compromised wounds, treat eczema, and speed up post-procedure recovery.

The core purpose of slugging is not to infuse the skin with new moisture, but rather to lock in the hydration that is already present. Occlusive agents do not penetrate deep into the tissue to deliver water. Instead, they sit firmly on top of the stratum corneum, the outermost layer of the epidermis, acting as a physical shield.

The Science of the Skin Barrier and Water Loss

To appreciate why slugging works, it helps to understand the structure of the skin. The skin barrier is frequently compared to a brick wall. The skin cells, or corneocytes, represent the bricks, while natural lipids, ceramides, and fatty acids act as the mortar holding everything together. This barrier plays a critical role in human health by keeping environmental toxins, bacteria, and irritants out, while keeping vital moisture in.

Throughout the day and night, the body naturally loses water through the skin via a biological process known as transepidermal water loss. When environmental conditions change, such as during the cold, dry winter months, or when you spend extended time in artificially heated or air-conditioned rooms, this water loss accelerates.

A compromised or dehydrated skin barrier leads to a variety of uncomfortable symptoms, including:

• Flaking and peeling

• Rough texture and dullness

• Increased sensitivity and redness

• Exaggerated appearance of fine lines and wrinkles

While standard lotions and creams provide essential hydration, a portion of their water content inevitably evaporates into the air after application. This is where petrolatum excels. Research indicates that pure petrolatum can reduce trransepidermal water loss by up to 98 percent. By creating an impermeable wall over the epidermis, the ointment forces the evaporating water back into the skin, plumping up the cells like a sponge.

Who Benefits Most from Slugging

Slugging is highly effective, but it is not a universal remedy. The success of this practice depends heavily on your specific skin type and current skin condition.

Dry and Dehydrated Skin

Individuals who naturally produce less sebum or those dealing with chronic dehydration will notice the most dramatic improvements. Slugging prevents overnight moisture evaporation, allowing these individuals to wake up with softer, smoother, and more resilient skin.

Mature Skin

As the body ages, natural oil production slows down, and the skin barrier becomes thinner and less efficient at holding onto moisture. By keeping the epidermis deeply hydrated overnight, slugging temporarily plumps the skin, which minimizes the visibility of fine lines and wrinkles.

Sensitive or Compromised Skin

If you have over-exfoliated your face with harsh acids, experienced a reaction to a strong topical product, or suffer from dry patches due to eczema, your skin barrier is compromised. A layer of an occlusive ointment gives the underlying tissue the protected environment it needs to repair itself without interference from external irritants.

Who Should Avoid Slugging

Because of the airtight seal created by petrolatum, certain individuals should skip this trend entirely to avoid unwanted side effects.

Oily and Acne-Prone Skin

Pure petrolatum itself is non-comedogenic, meaning it cannot physically block pores on its own. However, it is an exceptional trap. If you have oily or acne-prone skin, an occlusive layer will trap excess sebum, dead skin cells, and natural bacteria underneath it. This creates a warm, anaerobic environment that is perfect for the development of acne blemishes, blackheads, and cysts.

Active Skin Infections

If you have an open wound, an active bacterial or viral infection, or an undiagnosed rash, you should never slug. Trapping microbes against the skin can exacerbate the infection and prevent proper healing.

How to Properly Incorporate Slugging into Your Routine

If you decide that slugging suits your skin type, executing the process correctly is vital to maximizing benefits and avoiding breakouts. Slugging should always be reserved for your evening routine, as the heavy ointment does not sit well under makeup and will attract airborne dust and dirt during the day.

Step 1: Deep Cleansing

You must remove every trace of makeup, sunscreen, dirt, and daily grime. Because slugging seals the skin completely, any debris left behind will be forced into the epidermis overnight. Use a gentle, thorough cleanser to ensure the skin is perfectly clean.

Step 2: Apply Hydrating Topicals

While your skin is still slightly damp, apply your hydrating serums and toners. Look for products containing humectants, which draw water into the skin cells. Excellent ingredients to layer under your occlusive include:

• Hyaluronic acid

• Glycerin

• Niacinamide

• Aloe vera

Step 3: Layer a Traditional Moisturizer

Follow your serums with a reliable cream or lotion that contains emollients and barrier-supporting ingredients like ceramides. This step ensures there is plenty of moisture available for the occlusive layer to trap.

Step 4: Apply the Occlusive Layer

Take a small, pea-sized amount of your chosen ointment. Warm it between your fingertips and gently pat it across your face, focusing heavily on extra dry areas like the cheeks, lips, and under the eyes. You do not need a thick, gloopy layer; a thin, even sheen is more than sufficient.

Step 5: Morning Removal

When you wake up, use a gentle cleanser or an oil-based cleanser to break down the leftover ointment. Follow with your standard daytime skincare and a broad-spectrum sunscreen.

Crucial Product Considerations and Warnings

When selecting an ointment for slugging, simplicity is your best asset. Plain, 100 percent pure petroleum jelly is incredibly safe and hypoallergenic because it undergoes rigorous refining processes to remove impurities. Alternatively, you can use healing ointments formulated with additional supportive ingredients like mineral oil, dimethicone, or ceramides. Be cautious with ointments containing lanolin, as some individuals possess a natural allergy to this sheep wool derivative, which can cause itching and redness.

The most critical warning regarding slugging concerns the use of potent active ingredients. You should never slug on nights when you apply retinoids, retinol, alpha hydroxy acids, or beta hydroxy acids.

Because an occlusive layer seals the skin and amplifies the penetration of whatever sits beneath it, trapping strong actives can increase their potency to dangerous levels. This frequently results in severe chemical irritation, redness, burning, and a severely damaged skin barrier. Save slugging for your rest and recovery nights when you focus purely on hydration.

Frequently Asked Questions

Can slugging be done on other parts of the body besides the face?

Yes. The principles of slugging apply beautifully to any area of the body experiencing extreme dryness or cracking. It is highly effective when used on rough elbows, dry knees, cracked heels, and ragged cuticles. Applying an ointment to the hands or feet and covering them with cotton gloves or socks overnight can deeply transform dry skin.

Will slugging stain my bedding and pillowcases?

Because petrolatum is oil-based, it can leave greasy residue or stains on fabrics, particularly silk or high-thread-count cotton pillowcases. To protect your linens, apply your skincare routine roughly thirty minutes before going to sleep to allow the products to settle. You can also lay a clean, soft towel over your pillow or switch to an older pillowcase on nights when you choose to slug.

How many times a week should I slug my skin?

For most people with normal to dry skin, slugging is not a daily necessity. Doing it one to three times a week is generally enough to maintain a healthy moisture balance, especially during seasonal transitions. However, if you live in an exceptionally arid climate or are recovering from a damaged skin barrier, you can safely slug every night until your skin health stabilizes.

Can I use natural oils like coconut oil or olive oil for slugging instead?

While natural oils possess occlusive properties, they do not function exactly like petrolatum, which reduces water loss by up to 98 percent. Plant oils typically offer much lower rates of occlusion. Furthermore, many natural options like coconut oil are highly comedogenic and are much more likely to clog pores and cause breakouts compared to highly refined petroleum jelly.

Should I practice slugging if I have rosacea?

It depends on the specific subtype of rosacea. If you have dry, erythematotelangiectatic rosacea characterized primarily by redness and a compromised barrier, a thin layer of an occlusive can help soothe irritation. However, if you suffer from papulopustular rosacea, which involves acne-like bumps and pustules, slugging can trap heat and sebum, which often triggers a severe flare-up. Always consult a dermatologist if you are uncertain.

Is slugging safe to use over a fresh sunburn?

No. You should never apply a heavy occlusive ointment over a fresh sunburn. Sunburns trap a tremendous amount of heat within the skin tissues. Applying a thick barrier like petroleum jelly will lock that heat inside, preventing the skin from cooling down, which can prolong the burning sensation, increase inflammation, and potentially worsen tissue damage. Stick to lightweight, cooling aloe vera or specific post-burn lotions instead.

Can I practice slugging during the summer months?

Slugging is entirely safe to practice in the summer, though you may want to reduce the frequency. During warmer months, increased humidity levels mean the skin naturally loses less water to the environment. If you spend your summers in heavily air-conditioned environments, which dry out the air indoors, slugging once a week can help counteract that localized dehydration.