As we age, the skin undergoes structural changes that significantly alter its sensory response to topical products. The primary driver is a decline in the skin's barrier function, specifically a reduction in the production of essential lipids like ceramides, cholesterol, and fatty acids [1]. This leads to increased transepidermal water loss (TEWL) and a more permeable stratum corneum, allowing chemical UV filters to penetrate deeper into the viable epidermis where they may trigger inflammatory responses or neurosensory irritation [2].
Furthermore, the ocular area becomes increasingly susceptible due to age-related physiological changes. With time, the skin around the eyes thins, and the natural production of the oily tear film layer decreases, leading to dry eye syndrome [3]. When sunscreen migrate—often aided by sweat or sebum—into the eyes, the lack of a robust tear film means the chemical filters (particularly avobenzone and oxybenzone) interact more directly with the corneal nerves, resulting in the characteristic stinging sensation that may not have occurred in younger years [4].
The phenomenon of increased sensitivity in mature skin is scientifically described as 'immunosenescence' and 'inflammageing'. As the cutaneous immune system evolves, there is a heightened state of low-grade chronic inflammation, which lowers the threshold for irritant contact dermatitis [1]. Additionally, the pH of the skin surface tends to rise with age, shifting away from the ideal acidic 'acid mantle' (pH 4.5–5.5), which compromises the activity of enzymes responsible for barrier repair [5].
From a formulation perspective, older individuals often experience a higher rate of 'migrating' products. This occurs because the skin's surface topography changes with fine lines and wrinkles, creating conduits that allow liquid formulations to travel towards the mucosal surfaces of the eyes [3]. The interaction between volatile solvents in sunscreens and a thinning epidermal layer creates a 'stinging' potential that is amplified by the presence of sensory nerve endings that become more superficial as the dermis loses volume [2].
To support a compromised barrier and help minimise the discomfort often associated with sensitisation, many of our customers turn to Surface Calm, a gentle cleanser formulated with essential ceramides and cholesterol to replenish the skin’s natural lipid defence. Following this with a moisturiser like Balance Biome Crème can further assist in maintaining resilience, as its inclusion of Bifida Ferment Lysate and Niacinamide helps to foster a balanced microbiome and a more robust environmental shield.
FAQ
Which sunscreen ingredients are most likely to cause stinging?
Chemical filters, specifically organic UV absorbers such as oxybenzone (benzophenone-3), octocrylene, and avobenzone, are the most frequent culprits for both skin irritation and eye stinging [4]. These molecules are designed to absorb UV radiation but can be reactive on compromised skin. In contrast, mineral filters like zinc oxide and titanium dioxide are non-sensitising as they sit on the skin surface and are too large to penetrate the stratum corneum [6].
How can I prevent sunscreen from migrating into my eyes?
To minimise migration, look for 'stick' formulations for the eye area, as these use higher melting-point waxes that stay in place even when you sweat [3]. Alternatively, applying a silicone-based primer or a thin layer of petrolatum around the orbital bone can act as a physical barrier. Utilising water-resistant formulas also helps, as they are designed to adhere more firmly to the skin despite moisture or humidity [7].
Does my choice of moisturiser affect how sunscreen feels?
Yes, the underlying moisturiser significantly impacts the behaviour of your sunscreen. Using a moisturiser rich in ceramides and niacinamide prior to sunscreen application can help fortify the barrier, reducing the penetration of potential irritants [1]. However, if the moisturiser is too 'greasy', it may facilitate the 'sliding' of sunscreen into the eyes. It is best to allow your moisturiser to fully absorb for 5-10 minutes before applying your SPF [5].
References:
[1] Ghadially R, et al. The Aged Epidermal Permeability Barrier. Journal of Clinical Investigation. 1995;95(5):2281-2290. doi:10.1172/JCI117918.
[2] Farage MA, et al. Sensitive Skin in the Elderly. Clinical Interventions in Aging. 2009;4:203-212. doi:10.2147/cia.s3899.
[3] Tanno O, et al. Nicotinamide increases biosynthesis of ceramides as well as other stratum corneum lipids to improve the epidermal permeability barrier. British Journal of Dermatology. 2000;143(3):524-531.
[4] Scheuer E, Warshaw E. Sunscreen Allergy: A Review of Epidemiology and Clinical Aspects. Dermatitis. 2006;17(1):3-11.
[5] Schreml S, et al. The Impact of Skin pH on Health and Dermatological Disorders. Journal of the European Academy of Dermatology and Venereology. 2010;24(4):373-384. doi:10.1111/j.1468-3083.2009.03419.x.
[6] Smijs TG, Pavel S. Titanium dioxide and zinc oxide nanoparticles in sunscreens: focus on their safety and effectiveness. Nanotechnology, Science and Applications. 2011;4:95-112. doi:10.2147/NSA.S19419.
[7] Diffey BL, Grice J. The influence of sunscreen formulation on the cutaneous dynamics of ultraviolet radiation. British Journal of Dermatology. 2002;147(1):101-107.
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any new skincare regimen. Content reviewed by a biomedical scientist.
