7 Psoriasis Flare-Up Triggers You Might Not Expect

If you’re living with psoriasis, you probably already know that cold weather, stress, and certain medications can send your skin into a tailspin. But those aren’t the only threats to your skin. 

In recognition of Psoriasis Action Month this August, our board-certified dermatologists at Sanford Dermatology are here to shed light on seven surprising flare-up triggers — and offer tips on how you can work around them to keep your skin happier and healthier.

1. Skin injuries (even tiny ones)

This one often flies under the radar. Something as minor as a bug bite or sunburn can trigger a psoriasis flare through a process known as the Koebner phenomenon. When the skin is injured, it overreacts. In people with psoriasis, this overreaction can manifest as a new patch forming directly where the damage occurred.

We always tell our psoriatic patients to be gentle with their skin. Use sunscreen and wear protective clothing when hiking or gardening, and treat any nicks or cuts promptly.

2. Infections (even mild ones)

It’s not just major illnesses that can cause trouble. Even something like a sore throat or ear infection can wake up your immune system and prompt a psoriasis flare, especially in children and teens. Strep throat, in particular, is linked to a type of psoriasis called guttate psoriasis.

If you feel an infection coming on, don’t wait. Get checked out, treat it early, and let us know if your skin reacts afterward.

3. Certain foods

While there’s no one-size-fits-all “psoriasis diet,” some people find that dairy, gluten, or nightshades (like tomatoes, potatoes, and peppers) make their symptoms worse. Others notice flares after consuming sugar-rich treats or beverages, or ultra-processed foods.

Keep a food diary and track your flares. If you start noticing patterns, bring them up at your next appointment. We can help you experiment safely.

4. Alcohol

You don’t need to be a heavy drinker for alcohol to affect your skin. Some research suggests that moderate alcohol consumption can increase inflammation and reduce the effectiveness of some psoriasis treatments. Plus, it can worsen stress and sleep, two other psoriasis triggers.

If you’re planning a social night out, try mocktails or low-alcohol options, and keep your skincare routine consistent before and after.

5. Dry air (even indoors)

We usually blame winter weather, but indoor dry air — from fans, heaters, and air conditioners — can also strip your skin of moisture and lead to flare-ups. Use a humidifier at home or work, especially during drier months, and moisturize daily to restore your skin’s natural barrier. 

6. Bad skin habits

We get it: When your skin is flaky or itchy, you might be tempted to scrub it clean. However, aggressive exfoliation, rough towels, and even certain loofahs can irritate your skin and exacerbate the issue.

Want a better option? Stick to gentle cleansers and soft clothes. Pat your skin dry — don’t rub — and moisturize right after the shower to lock in hydration.

7. Stress about having a flare

This one’s particularly sneaky. Worrying about your skin can actually make it worse. Stress triggers inflammation, which then triggers more flares, creating a frustrating cycle.

Here’s a mind-body tip: Try building in small daily habits that reduce stress, like going for short walks, practicing breathing exercises, or taking screen-free breaks. And remember, seeking help is more than alright — it’s smart self-care.

Expert psoriasis management 

Living with psoriasis isn’t just about managing a skin condition; it’s about understanding your body and finding what works for you. While there’s no cure (yet), knowing your personal triggers (and how to dodge them) can make a huge difference in your day-to-day comfort and confidence.

If you're struggling to get psoriasis flares under control, or if you feel overwhelmed by your symptoms, expert support is closer than you think. Schedule an appointment at your nearest Sanford Dermatology office in Sanford, Pittsboro, or Lillington, North Carolina, today.