Vertical upper lip lines, often referred to as 'perioral rhytids' or 'smoker's lines', are primarily caused by the combination of intrinsic dermal atrophy and extrinsic photodamage. As we age, the degradation of collagen and elastin fibres in the mid-dermis reduces the skin's structural integrity, making it more susceptible to folding during muscular contraction [1]. The orbicularis oris muscle, which encircles the mouth, facilitates repetitive movements such as speaking, eating, and pouting. Over time, these dynamic expressions lead to static creases that remain visible even when the face is at rest [2].
Preventing these lines from deepening requires a multi-faceted approach focused on structural preservation and photoprotection. Daily application of a broad-spectrum SPF 50+ sunscreen is the most critical preventative measure, as ultraviolet (UV) radiation accounts for up to 80% of visible skin ageing in the Australian climate by accelerating the breakdown of the extracellular matrix [3]. Additionally, incorporating topical retinoids (Vitamin A) can stimulate neocollagenesis and improve epidermal thickness, which provides a more robust 'cushion' against repetitive mechanical folding [4]. Avoiding habits that involve repeated pursing of the lips, such as smoking or regular use of drinking straws, is also clinically recommended to minimise mechanical stress on the perioral tissue [5].
From a histological perspective, the perioral region is unique due to its high density of adnexal structures but relatively thin dermis compared to the cheeks. The junction between the vermilion border and the cutaneous lip is particularly vulnerable to volume loss. As oestrogen levels decline during menopause, there is a marked decrease in skin hydration and glycosaminoglycan content, which exacerbates the appearance of fine lines [1][6].
Furthermore, the Australian environment presents a significant challenge for perioral ageing due to high UV indices. Chronic UV exposure induces the expression of matrix metalloproteinases (MMPs), enzymes that specifically target and degrade type I and III collagen. This biochemical degradation, combined with the loss of subcutaneous fat pads in the upper lip area, leads to the characteristic vertical collapse of the skin surface [3][7].
To support the skin’s structural integrity against these repetitive movements, many individuals incorporate a peptide treatment serum like Cellular Thread to encourage a firmer, more resilient complexion. For those seeking to address the visible loss of suppleness, following with a rich moisturiser such as Cellular Crème can help seal the barrier and maintain the hydration necessary to minimise the deepening of fine lines.
FAQ
Can topical moisturisers actually fix deep lip lines?
While moisturisers containing humectants like hyaluronic acid can temporarily 'plump' the skin by increasing epidermal hydration, they do not resolve the underlying structural damage of deep lines. For long-term improvement, ingredients that influence cellular signalling, such as peptides and retinoids, are required to stimulate protein synthesis [4][8].
Why are these lines more prominent in women than men?
Research indicates that women have fewer sebaceous glands and sweat glands in the perioral area compared to men, which may result in less natural lubrication and a thinner dermis. Additionally, the skin of the female upper lip has fewer hair follicles, which are associated with thicker skin and greater structural support [1][9].
Are clinical treatments like dermal fillers or laser effective?
Clinical interventions are highly effective for established lines. Low-viscosity hyaluronic acid fillers can restore lost volume and hydrate the tissue from within, while fractional CO2 lasers or chemical peels promote significant dermal remodelling by inducing a controlled healing response that replaces damaged fibres with new collagen [2][10].
References:
[1] Paes EC, et al. Plastic and Reconstructive Surgery. 2009;124(2):608-617. doi:10.1097/PRS.0b013e3181addad5.
[2] Glogau RG. Dermatologic Clinics. 2001;19(1):189-204. doi:10.1016/S0733-8635(05)70258-2.
[3] Passeron T, et al. Journal of the European Academy of Dermatology and Venereology. 2021;35(7):1457-1464. doi:10.1111/jdv.17178.
[4] Zasada M, Budzisz E. Advances in Dermatology and Allergology. 2019;36(4):392-397. doi:10.5114/ada.2019.87443.
[5] Koh JS, et al. International Journal of Dermatology. 2002;41(1):21-27. doi:10.1046/j.1365-4362.2002.01334.x.
[6] Hall G, Phillips TJ. Journal of the American Academy of Dermatology. 2005;53(4):555-568. doi:10.1016/j.jaad.2004.09.035.
[7] Fisher GJ, et al. New England Journal of Medicine. 1997;337(20):1419-1428. doi:10.1056/NEJM199711133372003.
[8] Schagen S. Molecules. 2017;22(1):16. doi:10.3390/molecules22010016.
[9] Fenske NA, Lober CW. Journal of the American Academy of Dermatology. 1986;15(4):571-594. doi:10.1016/S0190-9622(86)70213-X.
[10] Alexiades-Armenakas MR, et al. Archives of Dermatology. 2008;144(10):1296-1302. doi:10.1001/archderm.144.10.1296.
