Psoriasis can be unpredictable. One week your skin may feel relatively stable, and the next you're dealing with increased redness, itching, scaling, or new patches that seem to appear out of nowhere.
The good news is that flare-ups rarely happen without a reason. Understanding what causes psoriasis flares can help you recognize patterns, reduce exposure to common triggers, and work with your dermatologist to better manage symptoms over time.
While psoriasis is a chronic autoimmune condition, many flare-ups are linked to factors such as stress, illness, medications, skin injuries, weather changes, and lifestyle habits. Knowing what to watch for is often the first step toward gaining more control over your skin.
What You'll Learn From This Article
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The most common psoriasis triggers and why they can worsen symptoms
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How stress, illness, and skin injuries affect psoriasis flare-ups
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Which medications may contribute to psoriasis flares
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Practical ways to support your skin barrier and reduce irritation
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When it's time to talk with a dermatologist about changing symptoms
Understanding Psoriasis and Why Flare-Ups Happen
Psoriasis is a chronic autoimmune disease that affects how quickly skin cells grow and shed. In healthy skin, old skin cells are replaced gradually. In psoriasis, the immune system mistakenly speeds up this process, causing skin cells to build up on the surface.
This buildup leads to many of the symptoms people associate with psoriasis, including:
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Thick, scaly patches
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Red or inflamed skin
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Itching
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Burning or stinging sensations
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Dry, cracked skin
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Discomfort that can interfere with daily activities
Psoriasis symptoms often come and go. Periods when symptoms worsen are known as psoriasis flare-ups.
What Happens During a Psoriasis Flare-Up?
During a flare, inflammation becomes more active. Skin cells multiply faster than normal, creating thicker plaques and more noticeable symptoms.
Some people experience mild flare-ups that affect only a few areas of skin. Others may notice larger areas of involvement or more severe itching and discomfort.
Common Symptoms of a Psoriasis Flare
Although symptoms vary, common signs of a psoriasis flare include:
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Increased redness
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More noticeable scaly patches
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Dryness and cracking
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Itching or burning
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Tender skin
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Joint pain or stiffness in people with psoriatic arthritis
Understanding why these flare-ups happen begins with identifying the factors that can activate inflammation in the first place.
What Causes Psoriasis Flares? The Most Common Triggers
There is no single answer to what causes psoriasis flares. Each person's triggers can be different.
Some people notice symptoms worsen during stressful periods. Others experience flare-ups after an illness, medication change, or skin injury. In many cases, several triggers may occur at the same time.
Research suggests that psoriasis triggers do not cause the disease itself. Instead, they can activate or worsen inflammation in people who already have psoriasis. Recent research reviewing psoriasis triggers highlights the complex relationship between environmental factors, immune responses, and flare activity in susceptible individuals.
Let's take a closer look at the most common triggers dermatologists see.
Stress and Emotional Health: One of the Most Common Psoriasis Triggers
Stress is one of the most frequently reported psoriasis triggers.
Many people notice that symptoms worsen during periods of emotional strain, major life changes, work pressure, financial concerns, or poor sleep.
Unfortunately, psoriasis and stress often create a cycle. Stress may contribute to flare-ups, and worsening skin symptoms can create additional stress.
How Stress Affects the Immune System
Stress affects multiple systems throughout the body, including the immune system.
When stress levels rise, the body releases hormones and inflammatory signals that may contribute to psoriasis activity. While stress alone does not cause psoriasis, it can make existing symptoms more difficult to manage.
Healthy Stress-Management Habits for People With Psoriasis
Stress management is not a replacement for medical treatment, but it can be a valuable part of a long-term management plan.
Helpful strategies include:
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Prioritizing consistent sleep
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Engaging in regular physical activity
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Practicing mindfulness or meditation
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Spending time outdoors
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Talking with a mental health professional when needed
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Making time for hobbies and social connection
Stress is only one piece of the puzzle. Infections can also trigger significant changes in psoriasis symptoms.
Infections, Illnesses, and Immune System Activation
Because psoriasis is an autoimmune condition, anything that activates the immune system has the potential to affect symptoms.
Infections are among the most common psoriasis triggers, particularly when they cause a strong immune response.
Strep Throat and Guttate Psoriasis
One of the best-known examples is the connection between strep throat and guttate psoriasis.
Guttate psoriasis often appears as numerous small, drop-like lesions across the body. This type of psoriasis frequently develops after a streptococcal infection, especially in children and young adults.
Other Infections That May Trigger Flare-Ups
Other illnesses that may contribute to a psoriasis flare-up include:
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Respiratory infections
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Viral illnesses
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Sinus infections
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Other conditions that stimulate the immune system
If a psoriasis flare appears shortly after an illness, it may be worth discussing the timing with your healthcare provider.
Not all triggers come from inside the body. Sometimes the skin itself sends the signal.
Skin Injuries, Sunburn, and the Koebner Phenomenon
Many people are surprised to learn that physical skin damage can trigger psoriasis lesions.
Dermatologists refer to this response as the Koebner phenomenon, which occurs when psoriasis develops in areas where the skin has been injured.
Common Types of Skin Injury That Can Trigger Psoriasis
Potential triggers include:
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Cuts and scrapes
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Surgical wounds
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Tattoos
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Friction from clothing
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Scratching
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Repeated skin irritation
Can Bug Bites and Sunburn Trigger Psoriasis?
Yes.
Bug bites can sometimes trigger localized psoriasis lesions in susceptible individuals. Sunburn can have a similar effect.
While moderate sun exposure may help some people with psoriasis, excessive sun exposure that leads to sunburn can worsen inflammation and increase the likelihood of a flare.
Protecting your skin from injury, irritation, and excessive UV exposure is an important part of long-term psoriasis management.
Another often-overlooked trigger may be hiding in your medicine cabinet.
Medications That May Trigger or Worsen Psoriasis
Certain medications have been associated with psoriasis flare-ups, either by triggering new symptoms or worsening existing disease.
A review published in the Journal of Clinical and Aesthetic Dermatology discusses the difference between drug-induced psoriasis and drug-aggravated psoriasis, emphasizing that medications can affect individuals differently.
Medications Associated With Psoriasis Flares
Some medications linked to psoriasis flares include:
What to Do if You Suspect a Medication Is Triggering Your Symptoms
If symptoms worsen after starting a new medication:
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Keep track of when symptoms began.
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Document any changes in severity.
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Contact the healthcare provider who prescribed the medication.
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Do not stop prescribed medications without medical guidance.
Medication-related triggers are only part of the picture. Daily habits and environmental factors can also play a meaningful role.
Lifestyle and Environmental Factors That Can Make Psoriasis Worse
Several everyday factors may contribute to psoriasis flare-ups or make symptoms more difficult to manage.
Smoking and Alcohol
Research has linked smoking with more severe psoriasis in some individuals. Excessive alcohol consumption may also worsen inflammation and interfere with treatment plans.
Dry Weather and Seasonal Changes
Many people notice more psoriasis symptoms during colder months.
Lower humidity levels can dry out the skin and weaken the skin barrier, leading to increased irritation, itching, and scaling.
Skin Care Habits That Support the Skin Barrier
Healthy skin barrier function matters for anyone with psoriasis.
Helpful habits include:
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Using gentle cleansers
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Avoiding harsh fragrances
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Moisturizing consistently
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Taking shorter, lukewarm showers
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Avoiding aggressive scrubbing
At Dermeleve, skin health starts with effective, science-backed formulations. That's why our products are developed with a focus on efficacy, safety, and ingredients that support the skin without unnecessary fragrances, dyes, parabens, or phthalates.
Even with excellent skincare habits, some flare-ups may require medical treatment and professional guidance.
How Psoriasis Flares Are Managed: Treatment Options and When to See a Dermatologist
Psoriasis treatment depends on several factors, including symptom severity, the areas affected, and whether conditions such as psoriatic arthritis are also present.
A dermatologist can help determine which treatment approach best fits your situation.
Topical Psoriasis Treatments
For mild to moderate psoriasis, treatment may include:
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Topical corticosteroids
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Vitamin D analogs
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Prescription anti-inflammatory creams
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Barrier-supporting moisturizers
Systemic and Advanced Treatments
Moderate to severe psoriasis may require treatments that work throughout the body, including:
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Oral medications
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Injectable therapies
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Biologic medications
Biologics target specific parts of the immune system involved in psoriasis and can be effective for some patients. Treatment decisions should always be individualized and guided by a qualified healthcare professional.
Managing Psoriatic Arthritis Symptoms
Psoriatic arthritis affects both the skin and joints.
Symptoms may include:
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Joint pain
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Stiffness
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Swelling
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Reduced range of motion
Early evaluation is important because untreated joint inflammation can lead to long-term damage.
When to Contact a Dermatologist
Consider scheduling an appointment if:
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Flare-ups become more frequent
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Symptoms are worsening
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Joint symptoms develop
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Current treatments are no longer helping
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You suspect a medication trigger
For individuals in Tampa and throughout Florida, working with a dermatologist can help identify trigger patterns and build a personalized management plan.
Once you understand your triggers and treatment options, the next step is creating a prevention strategy that works for your lifestyle.
Building a Personalized Psoriasis Flare Prevention Plan
No two people experience psoriasis the same way.
What triggers a flare for one person may have little effect on someone else. That's why tracking symptoms and identifying patterns can be so valuable.
Many dermatologists recommend keeping a simple symptom journal to help connect flare-ups with potential triggers.
Daily Habits That May Help Reduce Flare Frequency
While flare prevention is never guaranteed, these habits may help:
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Follow treatment recommendations consistently
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Moisturize regularly
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Protect skin from injuries
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Manage stress proactively
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Prioritize quality sleep
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Avoid smoking
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Limit excessive alcohol consumption
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Track potential triggers
The goal is not perfection. The goal is understanding what helps your skin function at its best.
At Dermeleve, our mission is to create dermatologist-informed skincare solutions that combine advanced science, proven efficacy, and a strong commitment to safety.
Every product we develop is made in the USA and designed to help address real-world skin concerns with thoughtfully selected ingredients and evidence-based formulations.
Understanding Your Triggers Is the First Step Toward Better Psoriasis Control
Psoriasis may be a lifelong condition, but flare-ups often follow recognizable patterns.
Stress, infections, skin injuries, medications, weather changes, and lifestyle factors can all contribute to worsening symptoms. Learning what causes psoriasis flares in your own case can help you make informed decisions about skincare, treatment, and daily habits.
While no single approach works for everyone, partnering with a dermatologist, maintaining a consistent skincare routine, and understanding your personal triggers can go a long way toward supporting healthier skin over time.
Living with psoriasis can be frustrating, especially when flare-ups seem unpredictable. Understanding your triggers and supporting your skin with a consistent routine can make a meaningful difference.
At Dermeleve, we're committed to developing science-backed skincare solutions that prioritize efficacy, safety, and skin health, helping you care for your skin with confidence every day. Browse our science-backed skincare solutions today.
FAQs
1. What causes psoriasis flares to suddenly get worse?
Psoriasis flares can worsen because of stress, illness, infections, medication changes, skin injuries, weather changes, or multiple triggers occurring at the same time. Keeping track of flare patterns may help identify contributing factors.
2. Can stress trigger a psoriasis flare?
Yes. Stress is one of the most common psoriasis triggers. Emotional stress can influence immune system activity and may contribute to increased inflammation and symptom severity.
3. Which medications are known to trigger psoriasis?
Some medications associated with psoriasis flare-ups include lithium, beta-blockers, certain antimalarial drugs, and some immune-modulating therapies. Always discuss concerns with your healthcare provider before making medication changes.
4. Can bug bites or sunburn cause a psoriasis flare-up?
Yes. Bug bites, scratches, and sunburn can trigger psoriasis lesions through the Koebner phenomenon, which occurs when psoriasis develops in areas of skin injury.
5. When should I see a dermatologist about a psoriasis flare?
You should consider seeing a dermatologist if symptoms become more severe, flare-ups occur more frequently, joint pain develops, or your current treatment plan is no longer providing adequate symptom control.