5 Common Psoriasis Triggers You Can Manage to Reduce Symptoms
One of the most frustrating things about psoriasis is its apparent unpredictability. A flare appears before an important meeting, after a holiday weekend, or for no obvious reason at all. But in most cases there is a reason — it just takes some detective work to find it.
The American Academy of Dermatology notes that triggers vary from person to person, and that finding yours requires paying attention to patterns over time.1 The five triggers below are the ones with the strongest evidence base and the most consistent presence in patient experience. Not all of them will apply to you — but understanding each one gives you a better map of what may be driving your flares.
Stress
Stress is the most universally reported psoriasis trigger — and one of the most difficult to manage, partly because psoriasis itself causes stress. The embarrassment of visible plaques, disrupted sleep from itching, and the unpredictability of flares all create a feedback loop: stress triggers psoriasis, psoriasis triggers more stress.
The mechanism is direct. Stress activates the body's inflammatory pathways and increases the production of cortisol and other stress hormones, which in turn dysregulate the immune responses already overactive in psoriasis. The AAD lists stress as one of the most common psoriasis triggers and recommends developing a stress management practice as a routine part of psoriasis care — not just during flares.1
The important nuance: you can't eliminate stress from your life. The goal isn't removal — it's building a consistent response system that prevents stress from translating into immune dysregulation.
- Build a daily stress management practice — even 10 minutes of structured breathing or meditation creates measurable physiological change over time
- Regular physical activity reduces baseline cortisol and improves mood; it doesn't need to be intense — consistent moderate movement matters more than occasional hard workouts
- Sleep quality directly affects immune regulation — disrupted sleep raises inflammatory markers. Treat sleep as a medical priority, not a luxury
- Cognitive behavioral therapy (CBT) has strong evidence for breaking the stress-psoriasis loop, particularly for people whose flares are closely tied to anxiety or work pressure
- Community support — whether in person or online — reduces the isolating effect of psoriasis, which is itself a stressor
Skin Injury — The Koebner Phenomenon
If you injure your skin — a cut, scrape, sunburn, insect bite, or even a rough shave — psoriasis plaques may appear at the site of injury within 10 to 14 days. This response is called the Koebner phenomenon, and it affects a significant proportion of people with psoriasis.1
The mechanism reflects psoriasis's autoimmune nature: physical skin trauma triggers an immune response, and in people with psoriasis, that immune response overshoots — producing the same accelerated skin cell cycle that drives plaque formation everywhere else. New plaques appearing at injury sites are a reliable sign that the Koebner phenomenon is active in your case.
This has practical implications for everyday decisions. Tattoos, piercings, aggressive exfoliation, rough loofahs, and even tight clothing that causes repeated friction can all trigger new plaques in people prone to Koebner responses. The AAD recommends talking to your dermatologist before getting any body art if you have psoriasis.1
- Treat skin injuries quickly — clean cuts and scrapes promptly and keep them moisturized to reduce the inflammatory response at the wound site
- Shave carefully — nicks and cuts are common Koebner triggers; use a moisturizer and shaving gel, and consider electric razors on affected areas
- Avoid aggressive scratching — scratching psoriasis patches worsens them and can spread new plaques; keep nails short and use cool compresses to manage itch instead
- Be cautious with sunburn — even mild sunburn counts as skin injury for Koebner purposes; use SPF 30+ on exposed areas
- Discuss tattoos and piercings with your dermatologist before proceeding if you know you have Koebner responses
Weather and Environment
Cold, dry air is the most commonly reported weather trigger — it strips moisture from the skin surface, weakening the barrier and making psoriasis plaques thicker, itchier, and more prone to cracking. The AAD notes that when humidity and temperature drop, psoriasis flares are more likely, and recommends specific adjustments to bathing and moisturizing routines in winter months.1
But weather's effects on psoriasis are more complex than just "winter is worse." Many people with psoriasis notice that summer heat, excessive sweating, chlorine from pools, and even air conditioning create their own flare patterns. The common thread is disruption to the skin barrier and immune equilibrium — which different environmental conditions achieve through different mechanisms.
One important counter-intuitive note: moderate sun exposure can actually improve psoriasis for many people. Ultraviolet light slows the abnormal skin cell cycle — which is why phototherapy is a medical treatment for psoriasis. But the same sun that helps in small doses can trigger flares through sunburn in large ones. The Koebner phenomenon makes sunburn particularly relevant here.
- In winter: use a humidifier indoors, switch to richer fragrance-free moisturizers, keep baths and showers under 10 minutes in warm (not hot) water, and moisturize immediately after drying
- In summer: rinse off chlorine promptly after swimming, wear breathable fabrics to reduce sweat-related friction, and apply SPF 30+ on healthy skin while getting limited UV exposure on psoriasis-affected areas
- Track seasonal patterns — if you reliably flare at the same time each year, prepare proactively with your dermatologist rather than reacting after the flare starts
Related: Winter skincare adjustments for psoriasis also apply year-round for scalp management. See our guide to Scalp Psoriasis: Causes, Treatments & Home Remedies for seasonal scalp care strategies.
Medications and Illness
Several commonly prescribed medications are documented psoriasis triggers. If you start a new medication and notice a psoriasis flare 2–3 weeks later, the timing is a meaningful signal worth discussing with your doctor.1
| Medication class | Common examples | What to do |
|---|---|---|
| Beta-blockers | Propranolol, atenolol, metoprolol | Talk to your prescribing doctor — alternative blood pressure medications may be available that don't trigger psoriasis |
| Lithium | Lithium carbonate | Discuss with your psychiatrist — do not stop without medical guidance |
| Antimalarials | Hydroxychloroquine, chloroquine | Inform your dermatologist if prescribed these alongside psoriasis treatment |
| NSAIDs | Indomethacin (less commonly other NSAIDs) | Paracetamol/acetaminophen is generally a safer alternative for pain relief |
| Corticosteroids (systemic) | Prednisone — particularly when stopped abruptly | Never stop systemic steroids suddenly; taper under medical supervision to avoid rebound flares |
Infections — particularly streptococcal throat infections (strep throat) — are also well-documented triggers, especially for guttate psoriasis. In children and young adults, a strep infection can precede a guttate flare by 2–3 weeks. Treating the infection promptly is important both for its own sake and for psoriasis management.
Important: Never stop a prescribed medication because you suspect it's triggering psoriasis without first talking to your doctor. The risks of stopping certain medications abruptly — particularly steroids, beta-blockers, and lithium — can be serious. Always discuss alternatives through the proper medical channel.
Alcohol and Smoking
Both alcohol and smoking have strong evidence as psoriasis triggers — and both reduce how well psoriasis treatments work. The AAD notes specifically that if you drink daily or more than 2 drinks frequently, psoriasis treatment may have little or no effect.1
Alcohol increases systemic inflammation, disrupts the gut microbiome in ways that worsen immune dysregulation, dehydrates skin, and interacts negatively with several psoriasis medications — particularly methotrexate, where alcohol dramatically increases liver toxicity risk. The combination of alcohol and psoriasis is well-studied enough that dermatologists routinely ask about drinking habits when treatment isn't working as expected.
Smoking is linked to psoriasis onset, severity, and treatment resistance. Cigarette smoke contains compounds that trigger immune system overactivity, increases oxidative stress, and constricts blood vessels — reducing oxygen flow to skin tissue. Smokers with psoriasis tend to have more widespread, more severe disease and respond less well to biological and topical treatments.
- Reducing alcohol intake — even moderately — is one of the most impactful single changes you can make if alcohol is a suspected trigger; many patients report clear improvement within weeks of cutting back
- If you're taking psoriasis medications, check with your dermatologist about specific alcohol interactions — some, like methotrexate, make alcohol avoidance mandatory rather than optional
- Smoking cessation has documented benefits for psoriasis severity; ask your dermatologist or GP for support resources — nicotine patches may be an option, though discuss with your dermatologist first as they can occasionally trigger flares in some people1
How to Find Your Personal Triggers
The five triggers above are the most consistent across the research and patient community — but triggers are highly individual. Someone whose psoriasis reliably flares after alcohol may have almost no stress response. Another person's worst trigger may be cold weather or a medication you've never taken.
The most reliable way to identify your triggers is the same method the AAD recommends: keep a simple log.2 Note what you eat, drink, and do, and track any skin changes over the following 24–48 hours. Patterns emerge within a few weeks. The key disciplines are consistency and patience — single-day reactions are less reliable than patterns observed over 3–4 weeks.
Once you identify a trigger, the goal isn't always complete elimination — that's not realistic for stress or winter weather. It's building a management response that reduces the trigger's impact before it reaches the threshold that sets off a flare.
Managing triggers reduces flares. Nopsor helps when they happen anyway.
Coal tar, salicylic acid, and 8 botanical herbs in a steroid-free nightly system. No prescription needed. Built for consistent long-term use.
See the Nopsor Treatment Set — $6840-day money-back guarantee · No prescription needed
Continue reading: For more on how psoriasis works at a biological level — and what that means for treatment — see What Is Psoriasis? How It Works, Types, Triggers & Real-Life Management. For the specific role diet plays in inflammation, see How Diet Can Impact Psoriasis: Foods to Try and Avoid.
References
- American Academy of Dermatology. Are Triggers Causing Your Psoriasis Flare-Ups? Accessed 2025.
- American Academy of Dermatology. Psoriasis Triggers: How to Find and Manage Yours. Accessed 2025.
- American Academy of Dermatology. Healthy Diet and Other Lifestyle Changes That Can Improve Psoriasis. Accessed 2025.
Leave a comment
Also in Psoriasis 101
Psoriasis vs. Eczema in Babies & Children
March 20, 2026
Both psoriasis and eczema are common in children, and they can look nearly identical in babies and toddlers. This guide explains the key differences in how each presents in young skin, what triggers each one, and what parents should watch for to get the right diagnosis.
Continue reading
Psoriasis Healing Stages: What Your Skin Looks Like
March 20, 2026
Psoriasis healing is not linear and it doesn't always look like progress. This guide walks through every stage — from active flare through early response, visible clearing, and remission — with specific descriptions of what your skin looks like at each point and what that means.
Continue reading
What Is Psoriasis? How It Works, Types, Triggers & Real-Life Management
December 16, 2024
If you just got a psoriasis diagnosis — or you've had one for years and still feel like no one fully explains it — this is where to start. We cover what psoriasis actually is, the 7 types, what triggers flares, and what living with it really looks like. Written by people who've been there, referenced against NIH, AAD, and National Psoriasis Foundation guidelines.
Continue reading