What Causes Psoriasis? Common Triggers, Risk Factors & Flare-Ups
Psoriasis is a chronic inflammatory skin condition that causes skin cells to build up faster than normal, resulting in thick, dry, scaly patches. These patches may appear on the scalp, elbows, knees, hands, feet, and other areas of the body. Depending on the type of psoriasis and skin tone, affected areas may look red, purple, brown, or darker than the surrounding skin.
But what causes psoriasis, and why do symptoms sometimes improve before returning as flare-ups?
Psoriasis is associated with an overactive immune response, genetic factors, and environmental influences. Although the exact cause is not fully understood, certain triggers, including stress, infections, skin injuries, and cold weather, may worsen symptoms in susceptible individuals.
Understanding the common causes of psoriasis, risk factors, and flare-up triggers can help you recognise changes in your skin, identify possible patterns, and make informed decisions about skincare and treatment.
In this guide, Skivon explains the science behind psoriasis, the factors that may trigger flare-ups, and practical ways to support psoriasis-prone skin.
What Causes Psoriasis?
Psoriasis is an immune-mediated inflammatory skin condition. It develops when changes in immune system activity contribute to inflammation and accelerate the production of skin cells.
Normally, skin cells develop and shed gradually. In people with psoriasis, this process becomes faster, causing cells to accumulate on the skin's surface. This buildup can create thickened patches, scaling, dryness, and itching.
The exact cause of psoriasis remains unclear, but researchers recognise several contributing factors:
Immune system dysfunction: Abnormal immune signalling contributes to inflammation and rapid skin cell turnover.
Genetic predisposition: Certain inherited genes can increase the likelihood of developing psoriasis.
Environmental triggers: Stress, infections, skin injuries, and weather changes may trigger or aggravate symptoms.
Lifestyle factors: Smoking, heavy alcohol consumption, and certain metabolic risk factors are associated with psoriasis.
Medication-related triggers: Some medicines may worsen psoriasis in susceptible individuals.
Not everyone experiences the same triggers. A factor that aggravates psoriasis in one person may have little effect on another.
10 Common Psoriasis Triggers That May Cause Flare-Ups
A psoriasis flare-up occurs when existing symptoms become more noticeable or severe. Flare-ups may involve increased scaling, itching, inflammation, dryness, or the appearance of new patches.
Recognising your personal psoriasis triggers can help you discuss symptom patterns with a healthcare professional.
1. Stress and Anxiety
Stress is a commonly reported trigger for psoriasis flare-ups. Emotional pressure, work demands, relationship difficulties, and disrupted sleep may coincide with worsening skin symptoms.
Stress can influence the body's inflammatory and immune responses, potentially contributing to symptom aggravation in susceptible individuals.
Tips to manage stress-related flare-ups:
Maintain a regular sleep schedule.
Practise relaxation techniques, meditation, or yoga.
Include suitable physical activity in your routine.
Take breaks during stressful periods.
Seek professional support when stress becomes difficult to manage.
Stress management may support overall well-being, but it does not replace appropriate psoriasis treatment.
2. Skin Injuries, Cuts, and Scratches
Skin trauma can trigger psoriasis lesions in some people. This reaction is known as the Koebner phenomenon, in which psoriasis develops at the site of an injury.
Possible triggers include cuts, scratches, insect bites, shaving irritation, friction, and sunburn.
To help protect psoriasis-prone skin:
Avoid scratching or picking scaly patches.
Use gentle skincare products.
Protect your skin from sunburn.
Reduce repeated friction where possible.
Clean minor injuries appropriately.
New patches following skin injury should be assessed by a healthcare professional if their cause is uncertain.
3. Infections
Certain infections can trigger psoriasis or worsen existing symptoms. Streptococcal throat infections are particularly associated with guttate psoriasis, which often appears as multiple small, drop-shaped lesions.
Some people notice psoriasis symptoms developing or worsening after an illness.
If you suspect an infection:
Seek appropriate medical advice.
Follow the recommended treatment for the infection.
Inform your healthcare professional if your skin symptoms change after an illness.
Do not take antibiotics or other prescription medicines for psoriasis unless they are medically indicated.
4. Cold Weather and Dry Skin
Cold temperatures, low humidity, and indoor heating can increase skin dryness and irritation. Some people with psoriasis notice more discomfort or flare-ups during winter.
Dry skin can feel tight, itchy, and uncomfortable, particularly when the skin barrier is already affected.
Skincare tips for cold weather:
Apply a fragrance-free moisturiser regularly.
Use lukewarm water rather than very hot water.
Choose gentle, non-irritating cleansers.
Protect exposed skin from cold winds.
Consider a humidifier if indoor air is very dry.
Moisturising can help relieve dryness and support the skin barrier, although it does not treat the underlying immune dysfunction associated with psoriasis.
5. Certain Medications
Some prescription medicines can trigger or worsen psoriasis in susceptible people. Medicines associated with psoriasis aggravation include lithium, certain beta-blockers, and some antimalarial drugs.
Abrupt withdrawal of systemic corticosteroids may also cause serious worsening in some cases.
If you notice a change in your skin after starting or stopping a medicine, contact your healthcare professional. Never discontinue prescribed medication without medical guidance.
Your doctor can assess whether a medicine may be contributing to your symptoms and discuss suitable alternatives if necessary.
6. Smoking and Tobacco Use
Smoking is associated with an increased risk of psoriasis and may contribute to greater disease severity in some individuals.
Tobacco use can affect inflammatory processes and overall health. Although stopping smoking does not guarantee that psoriasis will disappear, it can improve general health and may support long-term disease management.
Consider professional smoking cessation support if you need help quitting.
7. Heavy Alcohol Consumption
Heavy alcohol consumption has been associated with psoriasis and may complicate its management. Alcohol can also interact with certain medicines used to treat psoriasis.
Not everyone experiences alcohol as a direct trigger, so individual circumstances matter.
If you notice a relationship between alcohol consumption and flare-ups, discuss it with your healthcare professional. Ask about alcohol-related risks if you take prescription psoriasis medicines.
8. Sunburn and Excessive Sun Exposure
Sun exposure affects psoriasis differently from person to person. Some individuals may benefit from carefully supervised ultraviolet treatment, while excessive sunlight can damage the skin and trigger new lesions.
Sunburn may aggravate psoriasis through the Koebner phenomenon.
To protect your skin:
Use broad-spectrum sunscreen with SPF 30 or higher on exposed areas.
Wear protective clothing outdoors.
Avoid tanning beds and intentional sunburn.
Ask a dermatologist whether medically supervised phototherapy is appropriate.
Do not use uncontrolled sun exposure as a substitute for treatment.
9. Excess Body Weight and Metabolic Health
Psoriasis is associated with obesity and certain metabolic conditions. Excess body weight may be linked to increased disease severity in some people, although the relationship is complex.
Psoriasis can affect people of every body size, and body weight alone does not explain why the condition develops.
A balanced diet, regular physical activity, and appropriate medical support can contribute to overall health. Avoid restrictive diets, detox products, or unproven remedies marketed as psoriasis cures.
10. Friction and Skin Irritation
Repeated rubbing, tight clothing, and skin irritation may aggravate psoriasis in susceptible individuals. Sweating can also contribute to discomfort, especially when combined with friction or moisture trapped in skin folds.
To minimise irritation:
Choose comfortable clothing that reduces rubbing.
Change out of damp clothing after exercise.
Cleanse gently and pat the skin dry.
Apply a suitable moisturiser.
Avoid harsh exfoliants and products that cause irritation.
Persistent irritation, pain, or worsening lesions should be discussed with a healthcare professional.
Psoriasis Risk Factors: Who Is More Likely to Develop Psoriasis?
Psoriasis can develop at different ages and affects people of all skin tones. Although it is not always possible to predict who will develop the condition, several psoriasis risk factors are recognised.
Family History of Psoriasis
Having a parent, sibling, or other close relative with psoriasis can increase your risk. However, a family history does not mean you will necessarily develop the condition.
Genetic Factors
Psoriasis is associated with multiple genes involved in immune system regulation. Genetic susceptibility interacts with environmental influences, rather than a single gene determining whether someone develops psoriasis.
Immune System Changes
Changes in immune signalling contribute to inflammation and faster skin cell production. These processes play a central role in the development of psoriasis.
Infections
Certain infections, especially streptococcal throat infections, may trigger psoriasis in susceptible individuals. This association is particularly important in guttate psoriasis.
Environmental and Lifestyle Factors
Smoking, heavy alcohol consumption, skin injuries, stress, and cold, dry weather may contribute to symptom aggravation or disease risk.
Having one or more risk factors does not guarantee that psoriasis will develop.
What Are the Early Signs of Psoriasis?
Recognising the early symptoms of psoriasis can help you seek an accurate diagnosis and appropriate treatment.
Common signs include:
Dry, thickened patches of skin.
Scaling or flaking.
Persistent itching or irritation.
Inflamed patches that may appear red, purple, brown, or darker than surrounding skin.
Cracked skin that may occasionally bleed.
Scalp scaling or persistent flaking.
Nail pitting, thickening, or separation from the nail bed.
Psoriasis commonly affects the scalp, elbows, knees, and lower back, but it can develop elsewhere.
These symptoms are not exclusive to psoriasis. Eczema, fungal infections, and other skin conditions can produce similar changes. Consult a dermatologist if you have persistent or unexplained skin symptoms.
How to Identify Your Psoriasis Triggers
Identifying personal triggers may help you understand why symptoms worsen at certain times.
Step 1: Keep a Psoriasis Diary
Record your symptoms, affected areas, and the dates when flare-ups begin or improve.
Step 2: Track Possible Triggers
Note recent illnesses, stress levels, weather changes, skin injuries, new skincare products, and medication changes.
Step 3: Look for Repeated Patterns
A single episode does not establish a cause. Repeated patterns may provide useful information to discuss with your dermatologist.
Step 4: Maintain a Gentle Skincare Routine
Use appropriate moisturisers and gentle cleansers. Avoid scratching, harsh scrubbing, and products that consistently cause irritation.
Step 5: Consult a Dermatologist
A dermatologist can evaluate your symptoms, confirm the diagnosis, and recommend an appropriate management plan.
Do not deliberately expose yourself to a suspected trigger or stop prescribed medication to test a possible connection.
How to Manage Psoriasis and Reduce Flare-Ups
Although psoriasis is a chronic condition, appropriate treatment can help control inflammation, reduce scaling, and improve quality of life.
Follow a Suitable Treatment Plan
Depending on disease severity and location, treatment may include topical corticosteroids, vitamin D analogues, moisturisers, phototherapy, oral medicines, or biologic therapies.
A dermatologist can determine which options are suitable for your condition.
Moisturise Regularly
Moisturisers can help reduce dryness, soften scaling, and support the skin barrier. Choose products that suit your skin and do not cause irritation.
Avoid Scratching and Harsh Products
Repeated scratching can damage the skin and may contribute to new lesions. Avoid abrasive exfoliants and unverified products that promise a permanent cure.
Maintain Healthy Daily Habits
Adequate sleep, regular physical activity, stress management, and avoiding smoking can support general health. These measures should complement, not replace, medical treatment.
Monitor Your Symptoms
Keep track of changes in your skin and discuss persistent or worsening symptoms with your healthcare professional. Treatment may need adjustment over time.
Can Ayurvedic Skincare Help With Psoriasis?
People researching psoriasis may explore different skincare approaches, including Ayurvedic products. However, it is important to distinguish supportive skincare from treatments that address the underlying inflammatory disease.
Evidence for individual Ayurvedic products varies, and natural ingredients are not automatically safe or effective for every person.
Before using an Ayurvedic skincare product:
Check the ingredient list.
Avoid products that cause burning, redness, or irritation.
Ask a healthcare professional about possible interactions with your current medicines.
Consult a dermatologist before replacing prescribed treatment.
Seek medical advice for severe, persistent, or worsening symptoms.
Skivon offers Ayurvedic skincare products and educational resources focused on skin concerns, including psoriasis. Explore the information available on the Skivon website and consult a qualified healthcare professional about suitable care for your skin.
No product should be described as a psoriasis cure without reliable clinical evidence.
When Should You Consult a Dermatologist?
Seek professional advice if you have persistent scaly patches, recurrent flare-ups, significant itching, cracked skin, or symptoms that interfere with sleep and daily activities.
Medical assessment is particularly important if:
Your symptoms are spreading or becoming increasingly painful.
Your current treatment is not controlling your symptoms.
You experience joint pain, swelling, or prolonged morning stiffness, which may indicate psoriatic arthritis.
You develop extensive redness, widespread peeling, or pus-filled lesions.
Widespread redness or peeling accompanied by fever or feeling very unwell requires urgent medical assessment.
An accurate diagnosis is important because psoriasis can resemble other skin conditions, and different conditions require different treatments.
Conclusion
Understanding what causes psoriasis can help you recognise risk factors, identify possible triggers, and make informed skincare decisions. Immune system activity and genetics play central roles, while stress, infections, skin injuries, certain medicines, and environmental factors may contribute to flare-ups.
Because psoriasis varies from person to person, tracking symptoms, maintaining a gentle skincare routine, and following professional medical advice can support better long-term management.
If you experience persistent, unexplained, or worsening skin symptoms, consult a dermatologist for an accurate diagnosis and a treatment plan tailored to your needs.
Skivon aims to provide educational resources about psoriasis and other skin concerns to help readers make informed decisions about skincare.
Medical disclaimer: This article is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment.