Condition

Sun Damage (Photoaging)

Sun damage, or photoaging, is the build-up of changes caused by years of ultraviolet light — fine lines, uneven pigment, broken vessels, rough texture and loss of firmness. Most of what people call ageing skin is this.
At a Glance

Photoaging is what years of sunlight do to skin: fine lines, brown patches, small broken blood vessels, rough texture and skin that has lost its bounce. Compare the skin on your face with the skin on your inner upper arm — the difference between them is roughly the difference sun makes.

The encouraging part, which surprises people: a good share of it is reversible. Tretinoin and daily sunscreen both have real trial evidence for improving skin that is already damaged, not just for preventing more.

The part to take seriously: sun-damaged skin also grows actinic keratoses — rough, scaly spots that are early precancers. They are common, treatable, and worth showing to someone rather than moisturising.

Key Facts

How CommonUniversal to some degree. It is the main driver of visible skin ageing in most people.
Who Gets ItEveryone, but earliest and most obviously in fair skin. In brown and Black skin it shows up more as uneven pigment and texture than as wrinkles.
Chronic or CurableCumulative and partly permanent, but genuinely improvable. Damage keeps adding up unless the skin is protected.
Rx RequiredNo for prevention and modest improvement. Yes for the treatments with the strongest evidence.
ContagiousNo.

Symptoms

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Photoaging is a collection of changes rather than one, and they build so slowly that most people only notice by comparison. The inner upper arm, which sees almost no sun, is the honest control.

What it looks and feels like

Fine lines and deeper wrinkles — particularly around the eyes, the upper lip and the forehead.
Uneven brown patches and freckling — sun spots with sharp borders, appearing from the thirties onward. Unlike marks left by spots, these do not fade on their own.
Rough, dry texture — skin that feels like fine sandpaper and does not smooth out with moisturiser.
Small broken blood vessels — fine red threads across the nose, cheeks and chest.
Loss of firmness — skin that stays tented for a moment when pinched, and that has lost its snap.
A yellowish, thickened, leathery look — in heavily exposed skin, often with deep criss-cross lines on the back of the neck.
Rough scaly spots that come and go and never fully heal — these are the ones that matter. They are actinic keratoses, and they are treated rather than watched.

Where it shows up

  • The face, especially the forehead, nose, cheeks and around the eyes.
  • The backs of the hands and the forearms.
  • The chest and the V of the neck — often the first place people notice it.
  • The back and sides of the neck.
  • The ears and the scalp, where hair is thin.
  • One side more than the other, if you drive a lot. UVA passes through side windows, so damage is often heavier on the driver's side of the face and the left forearm.

How it looks on different skin tones

The classic photoaging picture — deep wrinkles, thin crepey skin, broken vessels — is what happens in fair skin. Brown and Black skin has more natural protection, so wrinkling comes later and is less severe, but the damage is still there and it shows up differently. It appears mainly as uneven pigment: patchy darkening, mottled tone, and enlarged pores and texture change. Visible light, not just UV, drives that pigment, and ordinary clear sunscreens do not block visible light — which is the specific reason tinted sunscreens containing iron oxides are recommended for deeper skin. Skin cancer is less common in brown and Black skin but is diagnosed later and does worse, so a rough patch or a sore that does not heal is not something to skip because of skin tone.

Light
Medium
Brown
Deep

Several other things cause spots and texture change. See Lookalikes near the bottom of this page.

Causes & Risk Factors

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Ultraviolet light comes in two kinds that matter here. UVB is the shorter one that burns the skin. UVA is longer, penetrates deeper, and is the main driver of photoaging — and it is present all day, all year, and passes straight through window glass. That is why sun damage accumulates in people who rarely burn and rarely sunbathe.

Deeper in the skin sits collagen, the protein scaffold that keeps skin firm, and elastin, which gives it recoil. UV switches on enzymes that break collagen down, and it slows the making of new collagen at the same time. Elastin fibres become clumped and disorganised instead of springy. UV also stimulates pigment cells unevenly, which produces the patchy brown spots, and weakens the walls of small blood vessels, which is where the fine red threads come from. On top of all that, UV damages DNA in skin cells directly — most of it is repaired, and the errors that are not are what eventually become actinic keratoses and skin cancers.

Most of this is dose. It is the sum of every ordinary day outdoors, not just holidays and sunburns. Roughly speaking, the majority of visible facial ageing is attributed to sun rather than to the passing of years, which is both the sobering part and the hopeful one — because the dose you get from here on is something you control.

What Hurts and What Helps

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What Makes It Worse

  • Everyday incidental sun. Walking to work, sitting by a window, gardening, waiting outside. This is where most lifetime exposure comes from, not from holidays.
  • UVA through glass. Car side windows and most office windows block UVB but let UVA through, which is why sun damage is often visibly worse on the driver's side of the face and on the left forearm.
  • Sunbeds and tanning. There is no safe tan. A tan is the skin responding to damage that has already happened.
  • Visible light, for pigment. Daylight and bright indoor light drive uneven pigment, particularly in medium and deep skin, and clear sunscreens do not block it.
  • Smoking. It compounds sun damage on collagen and adds its own lines around the mouth.
  • Relying on sunscreen alone, applied thinly and once. Most people apply well under the amount used in testing, and never reapply, which quietly halves what they think they are getting.
  • Assuming darker skin does not need protection. It burns less, but it still photoages, mostly as pigment and texture, and it still develops skin cancers.
  • Skipping the neck, chest, ears and hands. These are among the first areas to show damage and the ones people most reliably forget.

Daily Habits That Help

  • Daily broad-spectrum sunscreen, all year. This is the single highest-value habit here, and it is not just prevention — a well-known Australian trial found that people using daily sunscreen for several years had measurably less skin ageing than those using it occasionally. It also lowers the risk of skin cancer.
  • A tinted mineral sunscreen if pigment is your main concern. The iron oxides that give it colour are what block visible light.
  • A retinoid at night. Tretinoin is the best-evidenced topical treatment for photoaging, and it works on damage that has already happened — it increases new collagen, evens pigment and smooths texture over six to twelve months.
  • Hats, sleeves, sunglasses, shade, and UV film on car windows. Clothing is the most reliable sun protection there is, and it does not need reapplying.
  • Treating rough scaly spots rather than moisturising them. Actinic keratoses are early precancers, they are quick to treat, and treating a whole area is often better than picking off spots one at a time.
  • Getting your skin checked periodically if you have a lot of sun damage. Heavily photoaged skin is where skin cancers appear, and early ones are small problems.
+2 more
  • Measuring in years, not weeks. Photoaging took decades to build. Meaningful improvement from a retinoid takes six to twelve months, and lasers take months to show their full collagen result. Nothing here is fast, and anything sold as fast is not doing what it claims.
  • Stopping smoking, which is a genuine skin intervention as well as everything else.

Try at Home

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Two things do most of the work here, and both are available without a prescription: daily sun protection and a retinoid. Everything else is a supporting act.

Always
The one treatment that both prevents further damage and improves what is already there. Broad-spectrum matters, because UVA is what drives photoaging and passes through glass. Daily, all year, including the neck, chest and hands.
Moderate evidence
Clear sunscreens block UV but not visible light, and visible light drives the uneven pigment that is the main way photoaging shows in brown and Black skin. The iron oxides in a tinted sunscreen are what block it.
Moderate evidence
The over-the-counter version of the best-evidenced treatment for sun damage. Weaker and slower than tretinoin, but a sensible place to start. Build up gradually and give it six to twelve months.
Moderate evidence
Loosens the rough, dull surface layer that sun damage builds up, so skin looks smoother and reflects light better. Real but surface-level — it does not do much for the collagen underneath.
Limited evidence
An antioxidant that mops up some of the damage UV causes during the day, so it works best applied in the morning under sunscreen. It brightens a little. It is a partner to sun protection, not a replacement.
Limited evidence
Helps with uneven pigment and supports the skin barrier, which makes a retinoid easier to tolerate. Very well tolerated in its own right. A steady helper rather than a headline treatment.
Limited evidence
Marketed as a gentle alternative to retinol, and it is genuinely less irritating. The evidence behind it is a small number of short studies, so expect less than a retinoid delivers. Reasonable if retinoids are intolerable, or in pregnancy.

When to See a Dermatologist

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Much of this can be improved at home with sunscreen and a retinoid. Book a visit if:

  • You have a rough, scaly spot that keeps coming back, feels like sandpaper, or will not heal. That is the appointment that matters most on this page.
  • Any spot is growing, bleeding, crusting, or looks different from your others.
  • You have a lot of sun damage and have never had a skin check.
  • Twelve months of sunscreen and an over-the-counter retinoid has not shifted the texture or the pigment.
  • You are considering a laser or a peel and want an honest read on what it will and will not do for your skin tone.

What the visit gets you: rough spots identified and treated before they progress, prescription tretinoin or tazarotene, field treatments that clear a whole sun-damaged area rather than one spot at a time, and a realistic conversation about which in-office treatments suit your skin.

Prescription Treatments

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Prescription options are where the strongest evidence sits, both for improving damaged skin and for clearing the rough precancerous spots that come with it.

Strong evidence
The best-evidenced treatment there is for sun-damaged skin, and it works on damage already done — more new collagen, evener pigment, smoother texture. Start slowly, expect dryness for the first weeks, and judge it at six to twelve months.
Strong evidence
A stronger retinoid, also specifically studied for sun damage. It is particularly good on mottled brown pigment. More irritating than tretinoin, which is the reason it is not the default.
Strong evidence
For the rough scaly precancerous spots rather than the wrinkles. Applied over a whole sun-damaged area for a few weeks, it clears the visible spots and the ones not yet visible. It gets red and sore while working — that is the treatment, not a reaction.
Strong evidence
Used for the brown patches specifically, not for lines or texture. Prescribed in cycles of a few months with breaks in between, because long continuous use can cause a blue-black discoloration.

In-Office Treatments

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In-office treatments do things creams cannot — removing pigment, closing broken vessels and rebuilding collagen. They need several sessions, and the right choice depends heavily on your skin tone.

Strong evidence
The most powerful resurfacing option, and the one with the most downtime — a week or so of raw, swollen healing. It gives the biggest change in lines, texture and pigment in a single treatment.
Moderate evidence
Heats columns of skin without removing the surface, so recovery is a few days of pink, rough skin rather than a week off. It needs three to five sessions and gives a gentler result than CO2.
Moderate evidence
The best option for the colour part of sun damage — brown spots and the fine red broken vessels. It does little for wrinkles or firmness. Usually three to five sessions, with spots darkening and flaking off over a week.
Strong evidence
Aimed at the precancerous side of sun damage. A light-sensitising solution is absorbed by damaged cells, then activated with a lamp. It clears actinic keratoses across a whole area, and improves texture and pigment as a bonus.
Moderate evidence
A controlled acid application that lifts off sun-damaged surface layers. Light peels improve dullness and pigment with a few days of flaking. Deeper peels do more and carry more risk.
Limited evidence
Fine needles create controlled injury to prompt new collagen. It is one of the safer options on deeper skin because it uses no heat or light, but it gives a smaller result than lasers and needs several sessions.

What to Expect

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Step 1
The first three months on a retinoid

Dryness, flaking and some redness. Texture improves before anything else. Photograph now, because this is your baseline.

Step 2
Months three to six

Skin looks smoother and pigment starts to even out. This is when most people first notice a change rather than feel one.

Step 3
Months six to twelve

Where the real result sits. Fine lines soften and firmness improves as new collagen builds. This is the point at which a retinoid is fairly judged, not at week eight.

Step 4
After in-office treatment

Lasers and peels give a visible surface result in a few weeks, and their collagen effect keeps developing for three to six months afterwards. Expect several sessions rather than one.

Step 5
The long view

Sun protection is permanent, not a course. Stop it and damage resumes accumulating, and any pigment you cleared comes back. What you can realistically expect is meaningfully better skin, not the skin on your inner arm.

Complications

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The cosmetic changes are harmless. What sun damage brings with it is not, and it is worth being plain about.

Actinic keratoses
Rough, scaly, sandpapery spots on sun-exposed skin, often easier to feel than to see. They are precancers — a small proportion turn into squamous cell carcinoma over time, and there is no way to tell which. They are simple to treat, either individually with freezing or across a whole area with a cream. A rough patch that keeps coming back is worth showing to someone rather than exfoliating.
Skin cancer
Sun-damaged skin is where basal cell and squamous cell carcinomas appear, and cumulative sun exposure is a major factor in both. Both are highly treatable when caught early. Melanoma is linked more to intense intermittent burning than to steady exposure, but heavily sun-damaged skin still warrants keeping an eye on.
Later diagnosis in deeper skin
Skin cancer is less common in brown and Black skin, but it is found later and outcomes are worse. Some of that is because neither patients nor doctors expect it. A changing spot deserves the same attention whatever your skin tone.
Marks and pale patches from treatment
Lasers and peels aimed at pigment can cause pigment, particularly on brown and Black skin, and strong ablative lasers can leave permanent pale patches. This is why device choice and practitioner experience matter more than the brand name.
Spending a lot for less than hoped
Worth naming. Photoaging treatment gives real, partial improvement over months. Expecting a reversal of thirty years is the most common route to being disappointed by a technically good result.

Lookalikes

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Sun damage is a mix of changes, and a few of the things within it are treated very differently.

  • Actinic keratosis — the important one. A rough, scaly, sandpapery patch, pink or skin-coloured, that comes and goes but never fully clears. It is easier to feel than see. These are early precancers and they are treated, not monitored. If you take one thing from this list, take this.
  • Squamous cell carcinoma — a firm, growing, scaly or crusted lump that may be tender or bleed, often on the ear, lip, scalp or hand. It grows over months rather than staying stable.
  • Basal cell carcinoma — a pearly bump with fine branching vessels, which may bleed, scab and appear to heal repeatedly. Common on sun-damaged faces.
  • Seborrhoeic keratosis — a warty, waxy, stuck-on-looking brown growth that appears with age. Completely harmless, very common, and often mistaken for a sun spot or a mole. It sits raised on the skin rather than flat within it.
  • Sun spots (solar lentigines) — flat, sharply bordered brown spots. Part of photoaging, harmless, and they respond well to freezing and lasers. They do not fade on their own.
  • Melasma — large, symmetrical, blurry patches on the cheeks, forehead and upper lip, driven by hormones as well as light. It reacts badly to heat and aggressive lasers, so it is not treated like ordinary sun pigment.
  • Poikiloderma of Civatte — the mottled red-brown discoloration on the sides of the neck that spares the shaded patch under the chin. Pure sun damage, and that spared patch is the giveaway.
  • Intrinsic ageing — what skin does with time alone. Thinner, drier and finely lined, but even in colour and smooth in texture. Look at your inner upper arm to see it.
  • Melanoma — a spot that is growing, uneven in colour or border, or simply unlike your others. It needs looking at, not treating as a sun spot.
FAQ+
How much of skin ageing is actually sun?The majority of visible facial ageing is attributed to sun rather than to time. The easiest demonstration is your own inner upper arm - that is roughly what your skin would look like without the exposure.
Can sun damage be reversed?Partly, and more than most people expect. Tretinoin has good trial evidence for improving existing wrinkles, pigment and roughness, and daily sunscreen has been shown to reduce ageing over years. What you cannot do is return skin to undamaged. Realistic improvement is meaningful, not total.
Do I need sunscreen indoors?Near windows, yes. UVA passes through ordinary glass, and so does visible light. If you sit by a window or drive a lot, you are getting a daily dose.
Why is one side of my face worse?Driving. UVA comes through the side window, and long-term drivers often show noticeably more damage on that side of the face and on the left forearm.
Do people with dark skin get photoaging?Yes. It comes later and shows up differently - as patchy pigment, uneven tone and texture more than deep wrinkles. Sun protection matters, and tinted sunscreen matters specifically, because visible light drives that pigment.
What is a tinted sunscreen for?The iron oxides that provide the tint block visible light, which clear sunscreens do not. That matters if your main concern is uneven pigment, particularly on medium and deep skin.
What are the rough patches that keep coming back?Probably actinic keratoses. They are early precancers. They are quick to treat and worth having looked at rather than scrubbed or moisturised.
Is a base tan protective?No. A tan gives roughly the protection of a very low SPF, and getting it means doing the damage you are trying to prevent.
Retinol or tretinoin?Tretinoin has by far the stronger evidence for photoaging and is the one studied in the trials. Retinol works on the same pathway more weakly and inconsistently, and is a reasonable starting point if you cannot get or tolerate tretinoin.
Are lasers worth it?For pigment, broken vessels and texture, yes - they do things creams cannot. They are expensive, need several sessions, and on brown and Black skin the choice of device and practitioner matters a great deal, because the wrong one causes pigment problems.
Does vitamin C actually do anything?A little. It is an antioxidant that adds some protection alongside sunscreen and may slightly brighten. It is a supporting ingredient, not a treatment for existing damage.
Is it too late for me to start?No. Skin repairs some damage once exposure drops, and studies of daily sunscreen in adults show measurable improvement rather than just prevention. Starting at sixty is still worth doing.