There's nothing quite like arriving on holiday, feeling the warmth of the sunshine and looking forward to days by the pool or beach. But for some people, that excitement can quickly turn to frustration when an uncomfortable, itchy rash begins to appear.

Prickly heat is a common skin complaint, particularly during holidays in hot or humid climates. It can leave your skin feeling irritated, itchy and uncomfortable, making it difficult to enjoy the sunshine.

The good news? Understanding what causes prickly heat, recognising the symptoms and making a few simple changes to your holiday routine can help reduce the likelihood of developing it.

What Is Prickly Heat?

Prickly heat, also known as heat rash or miliaria, is a skin condition that develops when sweat becomes trapped beneath the skin.

Normally, your body produces sweat to help regulate its temperature. Sweat travels through tiny ducts to the surface of the skin, where it evaporates and helps you cool down.

However, when these sweat ducts become blocked, sweat cannot escape properly. Instead, it becomes trapped beneath the skin, causing irritation, inflammation and the characteristic itchy or prickling sensation.

Prickly heat is particularly common in hot, humid environments where the body produces more sweat than usual.

Although uncomfortable, it is generally harmless and usually clears up within a few days once the skin is kept cool.

What Does Prickly Heat Look and Feel Like?

Prickly heat can affect both adults and children and may appear anywhere on the body, although it commonly develops on the chest, back, neck and areas where clothing traps heat.

Typical symptoms include:

• Small, raised spots or bumps on the skin.

• An itchy, prickling or stinging sensation.

• Mild redness or inflammation.

• Small fluid-filled blisters in some cases.

• Discomfort that becomes worse when you sweat.

On lighter skin, prickly heat may appear red or pink. On darker skin, the bumps may be less visibly red and can appear grey, white or similar in colour to the surrounding skin.

The rash often becomes more noticeable after spending time outdoors, exercising or being exposed to humid conditions.

Why Do People Get Prickly Heat on Holiday?

If you've ever noticed that prickly heat appears almost as soon as you arrive somewhere sunny, there's a good reason.

Your skin may suddenly be exposed to much higher temperatures and humidity than it's accustomed to, particularly when travelling from the UK to warmer destinations.

Several factors can increase the likelihood of developing prickly heat.

1. Hot and Humid Weather

Heat encourages your body to produce more sweat, while high humidity makes it harder for that sweat to evaporate. This combination increases the risk of sweat becoming trapped beneath the skin.

2. Excessive Sweating

Walking in the sunshine, sightseeing, exercising or simply spending time around the pool can increase perspiration, particularly when your body hasn't yet adjusted to the temperature.

3. Tight or Non-Breathable Clothing

Clothing that traps heat and moisture against your skin can make prickly heat more likely. This is particularly relevant around the chest, back, waist and other areas where fabric fits closely.

4. Heavy Skincare Products

Thick, occlusive creams and ointments can trap heat and sweat against the skin, potentially contributing to blocked sweat ducts in susceptible individuals.

This doesn't mean you should avoid moisturisers or sunscreen. Instead, choosing products with comfortable, lightweight textures may help you maintain a practical skincare routine in warmer weather.

5. Sudden Changes in Climate

Moving from a cool British climate to tropical temperatures means your body needs time to adapt. During those first few days, it's sensible to avoid prolonged exposure to heat and excessive sweating.

How Can You Prevent Prickly Heat on Holiday?

While prickly heat cannot always be prevented, a few straightforward precautions can help reduce your risk.

1. Keep Your Skin Cool

Spend time in the shade, take breaks from the heat and make use of air-conditioned spaces when possible.

Try to avoid strenuous outdoor activities during the hottest part of the day, usually between 11am and 3pm.

2. Choose Loose, Breathable Clothing

Lightweight clothing made from cotton or breathable, moisture-wicking fabrics allows air to circulate around your skin and helps reduce the build-up of heat and moisture.

3. Take Cool Showers

A cool shower after a hot day can help remove sweat and soothe your skin.

Avoid harsh soaps and heavily fragranced shower gels, particularly if your skin is already irritated.

4. Avoid Heavy, Greasy Skincare Formulas

If you're prone to prickly heat, consider lightweight skincare textures that don't leave your skin feeling heavily coated.

Avoid applying thick ointments to areas affected by heat rash unless advised by a healthcare professional.

5. Stay Hydrated

Drink plenty of water throughout the day, particularly when spending time outdoors or taking part in physical activities.

Hydration helps your body regulate its temperature, although drinking water alone won't prevent blocked sweat ducts.

6. Choose Sun Protection That's Comfortable to Wear

Sun protection remains essential, even if you're prone to prickly heat.

Look for a broad-spectrum sunscreen with a comfortable texture that you can apply generously and reapply throughout the day.

Remember, sunscreen protects against UV radiation, but it doesn't replace the need to keep your skin cool.

Can Your Sunscreen Make Prickly Heat Worse?

It's a question many holidaymakers ask, particularly if they notice that their skin becomes itchy after applying sunscreen.

Prickly heat is caused by blocked sweat ducts rather than sunscreen itself. However, some thick or highly occlusive skincare formulations may trap heat and sweat against the skin, potentially aggravating symptoms.

It's also important to recognise that not every holiday rash is prickly heat. Fragrances, preservatives or other ingredients can sometimes cause irritation or contact dermatitis, which may look similar.

If you're prone to sensitive skin, choosing a sunscreen that's comfortable to wear and appropriate for your skin type can make your holiday skincare routine more pleasant.

Why Consider EVY Sunscreen Mousse?

EVY takes a different approach to traditional sunscreen formulations.

Developed in Sweden, its patented EVYDERM® technology uses an innovative mousse formula designed to spread throughout the upper layers of the skin, creating a lightweight, breathable protective membrane.

Unlike heavier creams, EVY's mousse absorbs quickly and is formulated to allow the skin to breathe and sweat naturally, without leaving a greasy finish.

EVY sunscreens are also developed with sensitive skin in mind, offering effective UVA and UVB protection alongside exceptional water resistance.

These qualities make EVY an appealing option for holidaymakers seeking lightweight, comfortable sun protection, particularly during hot weather and outdoor activities.

It's important to remember that EVY is a sunscreen, not a treatment or proven preventative for prickly heat.Keeping your skin cool and reducing excessive sweating remain the most effective ways to minimise heat rash.

How to Treat Prickly Heat if It Appears

If prickly heat develops during your holiday, the priority is to cool your skin and reduce further sweating.

Try the following:

• Move into a cool, shaded or air-conditioned environment.

• Take a cool shower or bath.

• Wear loose, breathable clothing.

• Apply a cool, damp cloth to irritated areas for up to 20 minutes.

• Avoid scratching, which can further irritate the skin.

• Avoid perfumed skincare products and heavy ointments on the affected area.

A pharmacist may recommend calamine lotion or other suitable treatments to relieve itching. The Rona Ross Range of Prickly Heat Treatments are particularly popular.

Most cases improve naturally within a few days. However, if the rash is worsening, becomes particularly painful, shows signs of infection or doesn't improve, seek medical advice.

Is Prickly Heat the Same as Sun Allergy?

No. Although the symptoms can sometimes appear similar, prickly heat and sun allergy are different conditions.

Prickly heat is associated with sweating and blocked sweat ducts. It can occur even without direct exposure to sunlight.

Sun allergy, including a condition called polymorphic light eruption (PMLE), involves a skin reaction triggered by exposure to sunlight, often affecting areas that have been exposed to UV radiation.

Both can cause itchy rashes during holidays, but they have different causes and may require different approaches to prevention and treatment.

If you regularly develop a rash after spending time in the sun, particularly when you're not overheating or sweating heavily, speak to a pharmacist or healthcare professional to establish the cause.

Enjoy Your Holiday Without the Irritation

Prickly heat can be frustrating, but it doesn't have to spoil your holiday.

Keeping cool, wearing breathable clothing, managing perspiration and choosing comfortable skincare products can all help you enjoy warmer climates more comfortably.

For sun protection, EVY's innovative mousse technology offers a lightweight, non-greasy alternative to conventional creams, combining advanced Swedish skincare science with long-lasting UVA and UVB protection.

Discover the EVY Sunscreen Range and enjoy lightweight, comfortable sun protection wherever your next adventure takes you.

Always follow sunscreen application instructions. Reapply at least every two hours and more frequently after swimming, heavy sweating or towel drying. No sunscreen provides complete protection against UV radiation.