Photoageing is the closest thing dermatology has to a deferred payment scheme. The exposure happens in a man's twenties and thirties, on building sites, on boats, on bicycles, on golf courses and in cars, and the statement arrives in his fifties.
1. What ultraviolet does
UVA makes up the great majority of ultraviolet reaching the ground, penetrates glass and cloud, is present throughout daylight hours and all year, and reaches the dermis. It generates reactive oxygen species, drives the enzymatic breakdown of collagen and produces solar elastosis, the accumulation of abnormal elastic material that gives photoaged skin its thickened, yellowish, leathery appearance.
UVB is more energetic, largely absorbed in the epidermis, varies strongly with season, latitude and time of day, and is the main cause of sunburn and of the direct DNA damage underlying most skin cancers.
Both matter, which is why UVA protection alongside SPF is the relevant specification rather than SPF alone. See sunscreen and men.
2. What photoageing looks like
- Coarse, deep wrinkling, distinct from the fine lines of intrinsic ageing.
- Solar lentigines: flat brown marks on the face, forearms, backs of hands and scalp.
- Mottled pigmentation and loss of even tone.
- Telangiectasia, particularly on the nose, cheeks and ears.
- A thickened, yellowed, leathery quality on chronically exposed sites.
- Actinic keratoses: rough, scaly, sometimes tender patches, which are the recognised precursors of squamous cell carcinoma.
- Deep furrowing at the back of the neck in men with long outdoor exposure.
The comparator that makes the point is the inner upper arm, which has had little exposure. The difference between that skin and the forearm on the same man is not chronological ageing. It is dose.
3. Occupational exposure
Outdoor trades are heavily male: construction, agriculture, groundwork, roofing, landscaping, fishing, transport and delivery, sport and outdoor instruction. Chronic daily exposure across a working life produces a different damage pattern from occasional intense holiday exposure, and both are risk factors for different skin cancers.
UK health and safety guidance treats solar radiation as a workplace hazard for outdoor workers, and the control hierarchy applies: schedule work to avoid peak hours where possible, provide shade, provide suitable clothing and headgear, and provide sunscreen as one part of a strategy rather than as the whole of it. In practice this is poorly implemented in many settings, and it is one of the more addressable gaps in male skin health. The related occupational picture is in occupational hand dermatitis.
4. Windows, cars and the exposure nobody counts
Standard window glass blocks most UVB but transmits a substantial proportion of UVA. Laminated windscreens block more than side windows do. The consequence is that drivers accumulate asymmetric exposure over years, and asymmetric photodamage in professional drivers is a well described phenomenon.
The same applies to office workers next to windows and to anyone who assumes that being indoors, or being in a car, means no exposure. It does not mean no exposure; it means less UVB and continuing UVA.
5. The British problem
The UK's ultraviolet index is modest for much of the year, which produces a specific and unhelpful assumption: that sun protection is a holiday matter. Two facts complicate that. First, UVA is present year round and through cloud, so the driver of dermal damage does not switch off in October. Second, British exposure patterns include intense intermittent burning during summer weeks and holidays abroad, which is the pattern most strongly associated with melanoma risk.
Meanwhile the low ambient index in winter is why vitamin D synthesis in the UK is limited between roughly October and March, which is a separate public health matter with its own guidance, and not a reason to seek ultraviolet exposure.
6. What can be done afterwards
| Intervention | What it improves | Realistic expectation |
|---|---|---|
| Stopping further exposure | Halts accumulation; some spontaneous repair occurs | The largest available effect, at any age |
| Topical retinoids | Fine lines, texture, some pigmentation, and the strongest topical evidence for photodamage | Months to years, gradual, requires persistence |
| Treatment of actinic keratoses | Precursor lesions | A medical matter with defined options; a reason to see a GP rather than a clinic |
| Chemical resurfacing | Surface texture and pigment | Depth dependent, see chemical peels and resurfacing |
| Fractional and ablative laser | Texture, pigment, deeper wrinkling | Effective, with genuine downtime and risk |
| Vascular laser or IPL | Telangiectasia and background redness | Targeted and generally effective for that specific feature |
| Antioxidant topicals | Theoretical support for reducing oxidative damage | Modest, and not a substitute for photoprotection |
7. Actinic keratoses are the medical part
Rough, scaly, sometimes tender patches on chronically exposed skin, most often the scalp, face, ears, forearms and backs of hands, are actinic keratoses. They represent dysplastic change and a proportion progress to squamous cell carcinoma. They are treated on the NHS with a range of established options, and they are not a cosmetic issue.
The practical instruction is straightforward. If a man in his fifties or older has multiple rough patches on the scalp or forearms that come and go, that warrants a GP appointment rather than an exfoliating product. The threshold for concern is set out in skin cancer in men.
8. Using the ultraviolet index properly
The solar ultraviolet index is published for UK locations in standard weather forecasts and is a better guide to whether protection is needed than temperature, cloud or season, none of which correlate reliably with ultraviolet intensity.
The convention is straightforward. An index of three or above is the point at which protection is generally advised for most people. In the UK that threshold is typically reached from around March to October, and it can be reached on a cool, overcast day, which is the case most men get wrong. Reflection off water, sand, concrete and snow raises effective exposure, and altitude raises it further.
For outdoor work, checking the index at the start of a shift is a more reliable trigger for action than judging by how warm it feels. It also makes the workplace conversation concrete: an employer asked to provide shade or reschedule work at an index of eight is being asked something specific rather than something general.