The function of the skin barrier, also known as the stratum corneum, is to act as the body’s first line of defence against the outside world, keeping beneficial substances like moisture in and harmful substances like irritants and allergens out.
Up to 30% of people with eczema have a weakened skin barrier due to mutations in the filaggrin gene, which helps strengthen skin cells and maintain hydration.13 These mutations can cause a "leaky" barrier and disrupt the skin’s pH, allowing abnormal bacterial growth that can trigger immune responses such as inflammation.14
An impaired skin barrier also allows moisture to escape, leading to dryness and cracks that allow irritants and allergens to enter. This can lead to sensitive skin, resulting in increased redness, itchiness, and discomfort.14
Emollients, such as QV Intensive Ointment and QV cream, can help repair and protect the skin barrier by forming an oily layer that traps moisture and seals it in, helping reduce water loss and filling gaps between skin cells. They also encourage hydration within the stratum corneum, which helps soothe and relieve the itch caused by dry atopic skin.
For best results during allergy season, they should be applied frequently.15 They can also be used alongside other prescribed medications such as topical corticosteroids and antihistamines to manage itch and soothe flare-ups.15
Other top tips during allergy season include:
- Using emollients that contain one or more efficacious moisturising ingredients such as glycerin, which mimics the action of the skin’s natural moisturising factor and occludents, which help form a near-waterproof coating on the skin to reduce water loss and increase skin hydration.16
- Avoiding common skincare ingredients such as fragrance and colour, as these can cause irritation in some people.17
- Gently cleansing skin with non-soap products like QV Gentle Wash after outdoor exposure to remove pollen.
- Using the "soak and seal" method, which involves bathing with products like QV Bath Oil in lukewarm water for a short time and then immediately applying an emollient.
- When out and about, use a high SPF sunscreen, preferably with moisturising ingredients to keep the skin hydrated.18
- Keeping windows closed during high-pollen days to prevent it from settling indoors, and washing bedding and pillowcases frequently to remove trapped allergens.
- Switching to a lighter emollient in warmer weather, such as QV Lotion.
Allergic conditions like eczema have risen worldwide in recent years. Researchers argue that this increase cannot be explained solely by genetics and propose that environmental changes might activate or worsen the disease in those who are genetically susceptible.2
As there is a strong connection between the skin’s protective barrier and whole-body immune responses, boosting the skin barrier is therefore a vital line of defence against allergen exposure.14
Research is still ongoing into how to halt the atopic march, but some insights suggest that early intervention with emollients can help support the skin barrier from birth. Strengthening the skin barrier helps prevent irritants, allergens, and bacteria from penetrating the skin and reducing the risk of triggering further allergies.1