Temperatures have been soaring in Singapore, coupled with the humidity in our tropical climate. This weather can wreak havoc on your skin causing a rise in symptoms including:
- Itchy and flaky skin
- Sensitive and raw areas to touch
- Irritated, painful and red patches
- Thick and rough patches with fine cracks
Dermatology clinics in Singapore typically see a 15-20% increase in heat-related skin problems like eczema, heat rash, and hives during these months.
Common skin problems arising from the heat
- Eczema: A chronic skin condition causing itchy and inflamed patches. Heat can worsen eczema symptoms.
- Heat rash: Also known as miliaria, this itchy and irritating bumpiness occurs when sweat gets trapped under clogged sweat ducts. It commonly affects babies and adults in hot, humid weather, particularly on the head, neck, chest, groin, and skin folds.
- Hives: Raised, itchy welts that appear suddenly and can disappear within hours or days. While heat can trigger hives, other factors like allergies or medications can also be culprits.
How heat affects your skin
In the hot weather, heat from our surroundings cause the following changes in your skin:
- Increased sweat production: This can trigger eczema flare-ups or heat rash.
- Increased oil production: Oily skin can lead to acne breakouts.
- Dilated blood vessels: This may trigger inflammation in those with eczema.
- Ultraviolet (UV) damage: Sun exposure can damage the skin barrier, leading to dryness, sensitivity, or worsen existing skin conditions.
Warm weather skincare tips
Here’s how you can keep your skin cool and protected during the hot months:
- Stay hydrated: Drink plenty of water throughout the day to prevent your skin from dehydration.
- Dress cool: Wear loose-fitting, breathable, light-coloured clothes when outdoors.
- Sun protection: Apply a broad-spectrum sunscreen with SPF 50 when going outdoors.
- Avoid hot timings: Avoid outdoor activity and exercise during the hottest part of the day, typically between 11am and 3pm.
- Avoid extreme temperature changes: Avoid going from hot outdoor temperatures to very cold air conditioning indoors, as this can further dry out sensitive skin.
Managing eczema in the heat
Heat and sweat are common triggers for eczema flare-ups. People with eczema have sweat with fewer natural moisturising and antimicrobial properties, making their skin drier and more prone to infection after sweating. Here’s how you can manage your eczema:
- Moisturise regularly: Regularly applying moisturiser can help to prevent dryness and irritation.
- Maintain good hygiene: Shower frequently with lukewarm water and a gentle cleanser to remove sweat and bacteria.
- Pat dry, don’t rub: After showering or sweating, gently pat your skin dry with a towel, especially in skin folds where sweat can accumulate.
- Avoid harsh soaps: Steer clear of harsh soaps and cleansers that can strip away natural oils and irritate your skin.
When to see a doctor
Most heat-related skin conditions can be managed with these simple tips. Heat rash typically goes away on its own once your skin cools down. However, seek medical attention if you experience:
- Signs of infection (e.g. pus, swelling)
- Painful rashes that blister or become open sores
- Persistent rashes that don’t improve within a few days
If you have eczema, you might require additional therapy or intensive treatment to control your symptoms during hot months.
Our dermatologist, Dr Kok Wai Leong, is ready to see you if you need medical attention for your skin. Book an appointment conveniently from our Virtual Patient Companion, or get in touch by send us an enquiry here.
References
- Tamagawa-Mineoka R, Katoh N. Atopic Dermatitis: Identification and Management of Complicating Factors. Int J Mol Sci. 2020 Apr 11;21(8):2671.
- Murota H, Yamaga K, Ono E, Katayama I. Sweat in the pathogenesis of atopic dermatitis. Allergol Int. 2018 Oct;67(4):455-459.
- Bothorel, B., Heller, A., Grosshans, E. and Candas, V. Thermal and sweating responses in normal and atopic subjects under internal and moderate external heat stress. Archives of dermatological research, 284 (1992):135-140.