TikTok moves fast. A single viral video can send millions of people scrambling for a new serum, an at-home gadget, or a do-it-yourself technique that promises glass skin by the weekend.
The most-viewed skincare videos on TikTok often feature routines built around several potentially irritating active ingredients at once, with some single videos promoting products containing as many as 21 such ingredients.
The appeal is obvious. The risks, however, rarely make the cut. That is where Beverly Hills Physicians, A premier medical group offering comprehensive beauty and wellness services across Southern California, comes in.
“I’ve seen firsthand how viral beauty trends translate into real skin damage in the treatment room,” says Dr. Kevin Hayavi, Medical Director and Managing Partner at Beverly Hills Physicians. “Patients come in with damaged skin barriers, unexpected breakouts, and reactions from procedures they attempted at home, and in almost every case, a TikTok video was the starting point.”
5 TikTok Beauty Fads Aestheticians Want You to Skip in 2026
Dr. Hayavi shares the five TikTok fads his team wants people to think twice about before trying in 2026.
- Overexfoliation and Acid Stacking
Exfoliation has a legitimate place in skincare, but TikTok has turbocharged it. “Acid stacking,” which refers to layering AHAs, BHAs, and retinoids in a single routine, is everywhere on the platform, with creators swearing by the combination for brighter skin.
The reality is less flattering. Combining multiple exfoliating acids strips the skin’s protective barrier, increases moisture loss, and triggers inflammation, the opposite of the glow people are chasing. Severe barrier damage can take two to four weeks to repair, during which skin becomes far more vulnerable to UV damage and bacterial infection.
“The skin barrier is your first line of defense,” says Dr. Hayavi. “When patients come in with sudden redness and breakouts, overexfoliation is one of the first things we investigate. More acids do not mean faster results; they set your skin back by weeks.”
- Slugging With Petroleum Jelly (and Worse Substitutes)
Slugging, applying a thick occlusive layer as the final step in a nighttime routine, has lingered on TikTok long past its peak. A well-formulated occlusive used correctly can support hydration, but the problem is the execution.
People often apply petroleum jelly directly over active ingredients like retinoids or vitamin C, trapping them against the skin at unintended concentrations and causing irritation or breakouts. Others go further, reaching for cooking oils or food-grade fats as substitutes, products never designed for overnight skin contact.
“Petroleum jelly is generally well-tolerated, but applying it over active ingredients is where things go wrong,” says Dr. Hayavi. “And swapping it for kitchen products with no formulation controls is a recipe for reactions we then have to treat in clinic.”
- At-Home Procedures Without Professional Training
Microneedling kits, dermaplaning blades, and deep extraction tools are all available online; they are demonstrated by influencers with compelling before-and-afters.
Performing cosmetic procedures at home without professional training can lead to infections, lasting skin damage, and complications that are difficult to reverse. At-home microneedling, in particular, introduces a real infection risk when performed outside a sterile clinical environment, and incorrectly angled dermaplaning can cause nicks, scarring, and post-inflammatory hyperpigmentation.
“These tools deliver real results in the right hands,” says Dr. Hayavi. “The before-and-after videos don’t show the cases that go wrong. In a clinical setting, depth, technique, and aftercare are tailored to the individual. At home, they’re guesswork.”
- Viral Skincare Routines Without Knowing Your Skin Type
A routine working wonders for a creator with two million followers will not automatically work for everyone watching. Ten-step routines and trending ingredient combinations get packaged as universal fixes, and audiences adopt them wholesale.
Ingredients like retinol, vitamin C, and exfoliating acids can benefit some skin types while breaking down the barrier, causing redness, or triggering dryness in others. Oily, dry, sensitive, and combination skin all respond differently to the same products.
“Your skin type is the starting point for everything,” says Dr. Hayavi. “Without knowing it, you are guessing. And sometimes those guesses are expensive to undo.”
- Mixing Active Ingredients Without Guidance
Ingredient awareness is a positive development in skincare culture, until it becomes overconfidence. TikTok tutorials routinely show people combining retinol with vitamin C or layering acids without accounting for pH levels or individual tolerance.
At the more extreme end, lemon juice, baking soda, and apple cider vinegar are being promoted as skincare staples. Kitchen ingredients are not designed for skin use and can cause allergic reactions, burns, and long-term damage.
“Some active combinations are contraindicated,” Dr. Hayavi explains. “And kitchen ingredients are not formulated for skin. The concentration, pH, and purity of a product matter enormously. What seems natural is not always safe.”
Dr. Kevin Hayavi, Medical Director and Managing Partner at Beverly Hills Physicians, comments:
“The most important thing I want people to understand is that skincare and cosmetic treatment are not one-size-fits-all. What clears up one person’s skin can trigger a serious reaction in someone else’s. Factors like skin type, underlying conditions, medication, age, and even climate all affect how your skin responds to any given product or procedure.
“TikTok has made people more engaged with skincare than ever before, and that curiosity is positive. But curiosity without professional guidance can lead people down a path of trial and error that causes real, lasting harm. The patients we see who have damaged their skin barrier, developed post-inflammatory hyperpigmentation, or dealt with infection from at-home procedures all had good intentions.
“Before adopting any new routine or treatment, speak to a qualified professional. A proper skin assessment takes minutes and can save you months of recovery.”