Psoriasis in Summer: How Heat, Sun and Swimming Can Affect Your Skin

 Published: 13^th Aug 2024 | Updated: 25^th Aug 2026 Eczema, Psoriasis and Dermatitis

For many people, the arrival of warmer weather brings a welcome relief for their skin. However, managing a chronic autoimmune condition like psoriasis means that summer is rarely straightforward. The season presents a complicated issue: while increased sunshine can dramatically improve symptoms for some, the accompanying heat, humidity, and lifestyle changes can trigger painful flare-ups for others.

Psoriasis causes skin cells to multiply much faster than normal, resulting in the build-up of red, flaky, and sore patches known as plaques. When seasonal shifts introduce new environmental stressors, understanding how to balance the benefits of summer against its hidden triggers is essential for maintaining comfortable skin.

What Happens To Psoriasis In Summer?

The shift into hot weather changes how our skin interacts with the environment. On one hand, the higher ambient humidity of summer can prevent the intense, brittle dryness often experienced during the winter months.

On the other hand, summer introduces distinct physical stressors, ranging from intense heat to chemical exposure in swimming pools, that can disrupt the skin barrier. For an overactive immune system, these disruptions are easily misinterpreted as threats, leading to increased inflammation and sudden plaque flare-ups.

Can Sunlight Help Psoriasis?

Controlled exposure to sunlight is a well-documented, natural way to improve psoriasis symptoms. Ultraviolet B (UVB) rays present in sunlight slow down the rapid growth of skin cells and reduce the localised inflammation that drives plaque formation. Many individuals find their plaques flatten, clear, or become significantly less itchy after brief periods in the sun.

However, the keyword is control. While a small amount of sun exposure can be therapeutic, overexposure reverses these benefits completely. Finding the right balance means allowing your skin to receive a few minutes of unprotected sunlight early or late in the day (outside peak hours), before applying robust sun protection.

Summer Psoriasis Triggers To Watch Out For

Navigating the warmer months successfully requires an awareness of several common seasonal triggers:

• Sunburn: Getting sunburned does more than just cause temporary redness; it inflicts structural damage on the skin. For people with psoriasis, any skin injury, including burns, scratches, or insect bites, can trigger a flare-up. This is a process where entirely new psoriasis plaques form precisely in the area of the injured skin.
• Sweating and Friction: High temperatures lead to increased sweating. Sweat contains natural salts and metabolic waste products that can collect in the creases of the skin (such as the armpits, groin, or under the breasts). This moisture traps heat, causes friction against clothing, and rapidly intensifies itching and soreness.
• Dehydration: When the body loses more fluids than it takes in during hot weather, the skin is the last organ to receive hydration. Dehydrated skin becomes brittle, loses its elasticity, and is much more susceptible to cracking and flaking.
• Swimming, Chlorine, and Sea Water: Taking a dip can be refreshing, but it comes with a catch. Swimming in chlorinated pools strips away the sebum (the skin's natural oily shield), leaving it tight, dry, and irritated. Conversely, while natural sea swimming can be highly therapeutic due to the anti-inflammatory properties of saltwater, letting salt crust and dry on the skin after exiting the water will exacerbate irritation.
• Pollen and Environmental Allergens: High pollen counts during spring and summer place a heavy burden on the immune system. For those prone to seasonal allergies, this elevated systemic immune response can inadvertently trigger a parallel inflammatory response in the skin.

How To Protect Your Skin During Hot Weather & Swimming

Protecting your skin barrier requires a proactive approach to summer activities. By implementing a few practical adjustments, you can enjoy the season without compromising your skin health.

Sun Protection Advice

Sunscreen is a non-negotiable tool for avoiding the Koebner phenomenon (where new areas of plaque appear after trauma, such as injury or sunburn). Opt for a broad-spectrum sunscreen with an SPF of 30 or higher that shields against both UVA and UVB rays. 

Sunscreens with active ingredients such as titanium dioxide and/or zinc oxide tend to be better for sensitive skin. These types of sun protection reflect light away from the skin because of the way it is absorbed and sit on top of the skin.

Remember to apply your sunscreen 20 minutes before heading outside, and reapply every two hours or immediately after swimming.

Swimming Precautions

Before entering a chlorinated pool or the sea, apply a thin layer of your usual emollient cream. This acts as a physical barrier, helping to block chlorine or excess salt from penetrating the skin. As soon as you step out of the water, rinse off thoroughly under a clean shower to remove all chemical and salt residues, then gently pat your skin dry with a soft towel; never rub your skin as this can irritate it.

Choosing The Right Skincare And Emollients

Standard, highly fragranced high-street soaps and light lotions are rarely suitable for summer psoriasis care. Managing plaques requires products that respect the skin's natural pH and actively work to rebuild the lipid barrier.

When choosing your summer skincare products, it is helpful to understand the different options available:

• Soap-Free Cleansers: Traditional soaps use harsh foaming agents that strip moisture away. Soap-free washes cleanse the skin using gentle oils or synthetic detergents that lift away sweat and dirt without disturbing the skin’s acidic environment.
• Emollients vs. Standard Moisturisers: Standard cosmetic moisturisers often have a high water content and evaporate quickly, providing only fleeting relief. Medical emollients are specifically formulated to trap moisture. They come in varying oil-to-water ratios, allowing you to tailor your hydration based on the severity of your dry patches.
• Light Creams vs. Heavy Ointments: While heavy, oil-based ointments are excellent for locking in moisture overnight or during dry winter spells, they can trap sweat and heat during humid summer days, potentially worsening itchiness. Moving to a slightly lighter, water-based cream during the day allows the skin to breathe while still delivering intense hydration.

Recommended Products For Summer Psoriasis Care

There are several trusted, clinically formulated skincare ranges available over the counter that provide excellent support for sensitive and plaque-prone skin during the summer:

• The QV Skincare Range: QV products are highly regarded for being vegan-friendly, dermatologically tested, and entirely free from common irritants like soap, fragrance, and artificial colours.  QV Gentle Wash is a superb daily choice for rinsing away summer sweat without drying the skin, and it can even be used as a gentle hair and scalp wash. Following your shower, applying QV Cream delivers highly concentrated, pH-balanced hydration that supports the skin barrier.
• The MooGoo Range: If you prefer naturally derived ingredients, MooGoo offers low-irritant formulations utilising natural oils (like sweet almond and olive oil) and milk protein to soothe inflammation and calm highly reactive skin.
• Epimax: Known for its highly effective, medical-grade simplicity, Epimax provides excellent budget-friendly emollients and cream cleansers that are perfect for daily, liberal application to keep the skin soft and pliable.

A Practical Summer Skincare Routine

Consistency is the foundation of successful psoriasis management. This simple three-step routine helps keep your skin stable through the heat:

1. Morning Cleanse & Protect: Wash your skin using a lukewarm shower and a soap-free cleanser like QV Gentle Wash. Pat dry, then apply a light emollient cream across your body. Allow it to sink in for 10-15 minutes before applying a generous layer of specialised sunscreen products.
2. Mid-Day Maintenance: If you become sweaty or have been swimming, rinse off with cool, fresh water as soon as possible. Reapply a light layer of emollient followed by your sunscreen. Keep hydrated by drinking water consistently throughout the day.
3. Evening Repair: Before bed, cleanse away the day’s sunscreen, sweat, and pollen. While your skin is still damp from the shower, apply a richer emollient cream or ointment to lock in moisture and support the skin's natural cellular repair process overnight. If you experience flaking or build-up on your scalp, incorporate targeted treatments highlighted in our comprehensive Scalp Psoriasis guide.

When Should You Speak To A Healthcare Professional?

While over-the-counter emollients and lifestyle adjustments form the baseline of daily care, they are not a replacement for medical guidance. You should schedule an appointment with your GP or a dermatologist if:

• Your psoriasis plaques rapidly spread to new areas of your body.
• Your skin becomes increasingly red, hot to the touch, swollen, or starts oozing fluid (signs of a potential secondary skin infection).
• The itching and pain become severe enough to disrupt your sleep or significantly impact your mental well-being.
• Your current prescription topical treatments (such as steroid creams) no longer seem effective.

For broader choices on topical management, you can read our detailed review of the Best Psoriasis Creams & Emollients article.

FAQs

Can I go swimming in a public pool if I have active psoriasis plaques?

Absolutely. Psoriasis is completely non-contagious; it cannot be spread to anyone else in the water. Just ensure you protect your skin barrier with an emollient before jumping in, and rinse the chlorine off immediately afterwards.

Is air conditioning bad for psoriasis?

Yes, it can be. While air conditioning keeps you cool and prevents sweating, it actively strips moisture from the air. Spending prolonged periods in air-conditioned environments can dry out your skin, so remember to moisturise more frequently if you are indoors.

How can I tell the difference between a psoriasis flare-up and a sun allergy?

A psoriasis flare-up typically causes thick, raised plaques covered in silvery scales that develop over several days. A sun allergy (such as polymorphic light eruption) usually appears within hours of sun exposure as a widespread rash of small, intensely itchy red bumps or hives on exposed skin. If you are unsure, consult a medical professional.

Additional Support

For more detailed clinical information and community support networks, you can explore the official guidance provided by NHS Psoriasis and the Psoriasis Association. To browse specialised creams, washes, and skin support, view our full Psoriasis category.