Everything You Need To Know About A Damaged Skin Barrier: Causes, Remedies, Best Products + Expert Tips

Repairing a damaged skin barrier will certainly improve the aesthetic appearance of your skin—but this barrier holds importance for your overall health, too. It's easy to get caught up in the superficial side of skin care, but you can't forget that your skin is an organ—the largest organ on your body. 

Just as any other organ dysfunction would have implications for your overall health, the skin isn't any different. And while we've commercialized products, devices, and treatments—skin care starts with barrier care. 

First things first—let us explain what exactly the barrier is. "The skin barrier starts with the top layer of the skin called 'epidermis,'" board-certified dermatologist Kseniya Kobets, M.D., MHS, FAAD, tells mbg. 

"This layer is made up of exfoliating skin cells that turn over every 28 days. This skin layer has channels that allow water to be absorbed and evaporated and has hydrating ingredients like ceramides, free fatty acid, and linoleic acid, to maintain a healthy skin barrier that protects us from external pollution, sun damage, and pathogens like bacteria, yeast, and viruses," she adds. 

Now you know the very basic function of the skin barrier. Up next, a quick breakdown of each part of the stratum corneum in a bit more detail. 

As you can tell, the skin barrier isn't just how your skin looks but rather how it lives, too. In turn, a healthy skin barrier means a healthier you, and vice versa. 

"It protects us from mechanical injury, low humidity, cold, heat, sun, wind, chemical exposure, bacteria, viruses, fungi, and other pathogens," board-certified dermatologist Hadley King, M.D., said about the barrier and added that "a healthy barrier is critical to normal skin function."

And this isn't just skin deep—research has demonstrated a link between skin dysfunction and various health conditions caused by chronic inflammation. In one study, researchers connected the use of barrier repair moisturizers with reduced pro-inflammatory cytokines in the blood, highlighting the importance of the skin's protective role in our overall health: Namely, that poor barrier function is linked to inflammation that can trigger other health concerns.

While there are plenty of factors that contribute to a damaged skin barrier, board-certified dermatologist and assistant clinical professor of dermatology at Mt. Sinai School of Medicine Jeannette Graf, M.D., says skin care products might be the most common culprit. 

"The most common is over-stripping the skin of its natural oils," Graf says. "This can be done by washing your face too much and over-exfoliating the skin," she adds. While retinol, AHAs, and BHAs have wonderful benefits, they should be used in moderation (as with skin cycling). 

Plus, Graf says these actives should be used in conjunction with a barrier-supporting routine. Translation: Use one active product, not five. If you're looking to exfoliate, use one exfoliating serum or physical wash, not both—you get the idea. 

Know this: Your gut and skin are directly connected. To put this into perspective, "About 7 to 11% of people with inflammatory bowel disease (IBD), for instance, have psoriasis3," board-certified internal medicine doctor Vincent Pedre once told mbg. 

"Gut inflammation eventually can become systemic inflammation. And that, along with oxidative stress, blood sugar imbalances, and other problems4, can all show up on your skin—especially if you are genetically predisposed to these conditions," he adds.

But what foods are the most triggering? "The simple sugars, when digested, cause rapid insulin spikes that result in the downstream effect of inflammation, which, in turn, leads to skin barrier breakdown," board-certified dermatologist Rachel Westbay, M.D., FAAD, of Marmur Medical tells mbg.

Even acne, the most common skin condition, can be improved when focusing on gut health. "One study found a probiotic supplement improved acne in 80% of the 300 participants3. Among their benefits, probiotics can help modulate immunity and inflammation, reducing acne in the process," Pedre said. 

What's more, one study noted by the American Academy of Dermatology reported that women who drank two or more glasses of skim milk a day were 44% more likely to have breakouts5. 

Another study noted on the AAD demonstrated that a low-glycemic index diet may result in fewer pimples. Not sure which foods are considered high on the glycemic index? Check out this story. 

When your body's cortisol levels are spiked, your skin shifts. A few bouts of stress can cause you to produce more sebum that could lead to increased breakouts6 (yes, stress acne is a real thing). 

What's more, chronic stress can lead to an imbalanced microbiome in which the bacteria responsible for acne can flourish.

"UV exposure damages the skin barrier by causing free radicals, which subsequently leads to burns and skin cancer," Boakye notes. Plus, when your skin gets to the point of peeling off (as happens with severe sunburns), you're literally removing a layer of your skin. 

Regardless of lifestyle factors, those with certain skin conditions may be more prone to barrier damage than others. "The two most common conditions dermatologists think of when we consider someone an inherent risk of skin barrier dysfunction are eczema and rosacea," Westbay notes. 

In part, this is because those with eczema and rosacea already have dry skin to begin with due to a natural lack of ceramides in the skin. This means they're just a bit closer to a compromised barrier without being exposed to any other triggers. 

Those with sensitive skin already have a compromised skin barrier as well. Remember how the barrier functions as a protective shield? Well, that applies to "normal" skin, or skin that isn't as sensitive. 

When that shield is weakened, it isn't as able to perform this role, allowing irritants to penetrate the skin and cause major and chronic disruptions in the form of rashes, inflammation, texture changes, burning, and so on.  

Check the list above and write down (or make a mental note) of what applies to you right now. Are you over-exfoliating? Going outside without SPF? Are you more stressed than usual? 

When your barrier is damaged, you should tread very carefully in terms of topical products. You'll want to stay away from fragrance for the time being, as a damaged barrier is more susceptible to developing allergies or sensitivities. 

As you now know, your skin is sensitive to what's happening inside your body—but it will respond to positive triggers, too. Do your best to consume loads of water to support your hydration levels and prevent dehydrated skin and consume skin-loving ingredients.

Luckily, the skin is an incredibly resilient organ. This means it can certainly be healed. In fact, it doesn't take too long.

Phew—that was a lot. Your skin barrier is incredibly important for your health, but it's also easily damaged. To repair a damaged skin barrier, avoid irritating ingredients, procedures, and devices. Opt for hydrating, soothing topical products and prioritize hydration from within as well. To learn more about the skin barrier (and some exciting new developments), check out this story.