White Spots on Skin: Causes, Pictures and When to Worry (UK)

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White spots on the skin are common and, in most cases, harmless. The tricky part is that several very different conditions all show up as pale patches or small white bumps, and they need completely different treatment. A flat, milky patch that is slowly spreading is not the same thing as a hard little bump under the eye, and telling them apart matters.

This guide walks through the main causes, gives you a plain-English way to tell them apart, explains what each one looks like, and flags the few situations where you should get a white patch checked by a GP or dermatologist.

What causes white spots on the skin, and how do you tell them apart?

Most white spots are cosmetic, not dangerous. But a small number of pale skin changes are worth a professional look: patches that keep spreading, anything that follows sun damage and changes shape, or a white area inside an existing mole. The goal here is to help you work out which bucket you are probably in, so you know whether to leave it alone, treat it at home, or book an appointment.

This is not a diagnosis. Skin is genuinely hard to read from a description, and conditions overlap. Use this to get oriented, then confirm with a professional if anything is changing or worrying you.

The main causes at a glance

Here is how the most common causes of white spots compare. Use it as a starting point, not a final answer.

The two most useful questions to ask yourself: is it raised or flat? and is it spreading or staying put? Those two answers narrow things down fast.

Milia: small, hard white bumps

Milia are tiny keratin-filled cysts that sit just under the surface of the skin. They look like small white or yellowish bumps, usually 1 to 2 mm across, and they feel firm, almost like a grain of sand under the skin. They are extremely common around the eyes and on the cheeks, and they are very common in newborns, where they are often called milk spots.

The key thing that separates milia from a spot or whitehead: they are not red or inflamed, they do not have a head, and they will not pop. Trying to squeeze them tends to bruise or irritate the skin instead. Contrary to a common worry, milia are not caused by poor hygiene; they form when keratin gets trapped under the skin, and they happen to people with perfectly good skincare routines.

What to do: In babies and many adults, milia clear on their own over weeks to months. In adults they can be stubborn. A gentle skincare routine, regular light exfoliation and avoiding heavy, pore-clogging eye creams can help prevent new ones. If a cluster is persistent and bothering you, a professional can remove them in a sterile setting. Do not pick at them yourself, as that risks scarring and infection.

UK clinics typically charge from around £110 per session for milia removal (sk:n), with other clinics quoting roughly £50 to £250 per session, sometimes priced per spot at about £10 to £60 each (Harley Street Skin Clinic), and London clinics such as Cosmedics from £250, often with a separate consultation fee. We cover the options and prices in depth in our guide to milia removal, and if your white spots are specifically around the eye area, we go into detail in our guide to white spots under the eyes.

Whiteheads: blocked pores, not true white spots

Worth a quick mention because they get mixed up with milia. Whiteheads are a mild form of acne: a pore blocked with oil and dead skin cells. Unlike milia, they sit at the surface, can have a soft white head, and are part of the acne picture, sometimes with surrounding redness. They respond to a normal acne or oily-skin routine and exfoliation, whereas milia do not. If in doubt, the firmness test helps: milia feel hard and grain-like, whiteheads feel softer.

Pityriasis alba: pale, slightly scaly patches

Pityriasis alba shows up as pale, faintly scaly oval or round patches, most often on the face and upper arms, and most commonly in children and younger adults. It is thought to be linked to eczema and dry skin, and the patches are usually more noticeable after sun exposure, when the surrounding skin tans and the pale areas stand out. It is one of the most common reasons for white spots on a child’s face.

It is not contagious and it is not harmful. The patches typically fade over months, though they can come and go and occasionally linger for a year or more.

What to do: A good moisturising routine and daily sunscreen are the mainstays. A GP or pharmacist may suggest a mild treatment if the skin is dry or irritated. Because it is closely tied to eczema-prone skin, keeping the skin barrier hydrated is the most useful long-term step.

Tinea versicolor: a yeast imbalance

Tinea versicolor, also called pityriasis versicolor, is caused by an overgrowth of a yeast (malassezia) that normally lives on everyone’s skin without causing problems. When it multiplies, it interferes with the skin’s pigment and produces small patches that can be lighter (or sometimes darker or pinkish) than the surrounding skin, often with a fine, flaky scale. It tends to appear on the chest, back, shoulders and upper arms, and is more common in warm, humid conditions and in people who sweat a lot.

It is not contagious, because the yeast is already present on most people’s skin. The pale patches often become most obvious after the rest of the skin tans, since the affected areas do not tan in the same way.

What to do: Mild cases respond to antifungal treatments, several of which are available from a pharmacy without a prescription. Antifungal shampoos containing ketoconazole or selenium sulphide are commonly used on the affected skin (left on for a few minutes, then rinsed) as a self-care option, and antifungal creams also work for smaller areas. A widely available ketoconazole option is Nizoral anti-dandruff shampoo, which can be applied to the body for this purpose; check the label and ask a pharmacist if you are unsure. More widespread or stubborn cases may need treatment prescribed by a GP. One thing to set expectations on: even after the yeast is treated, the colour difference in the skin can take weeks or months to even out, so the patches do not disappear overnight.

Vitiligo: well-defined milky-white patches

Vitiligo is different from the conditions above because it involves a genuine loss of the cells that make skin pigment (melanocytes). The result is well-defined, milky-white patches with otherwise normal skin texture. It can appear anywhere, but commonly affects the hands, the face, and the skin around the mouth and eyes, and the patches are often roughly symmetrical on both sides of the body. Early (stage 1) vitiligo often starts as one or a few small, pale patches before any wider spread, which is why a single new milky-white patch is worth keeping an eye on.

Vitiligo is not contagious and is not dangerous to your physical health, but it can be progressive and can have a real emotional impact, which is a legitimate reason to seek support and treatment.

What sets it apart: the patches are flat and smooth (no scale, no bump), the edges are usually sharp and clearly defined, the colour is a true white rather than just “paler,” and it tends to spread over time rather than fade. If that matches what you are seeing, it is worth a GP visit.

What to do: See a GP, who can assess the patches and refer you to a dermatologist if needed. Treatments aim to slow progression and restore a more even skin tone, and the right option depends on how much skin is involved and where. Daily sunscreen on affected areas is important, because depigmented skin has no natural protection from the sun.

Sun-related white spots (idiopathic guttate hypomelanosis)

Despite the intimidating name, this one is very common and harmless. Idiopathic guttate hypomelanosis produces small, sharply defined flat white dots, usually a few millimetres across, most often on the shins and forearms: the areas that get the most lifetime sun. It is linked to sun exposure and skin ageing, is more noticeable on fairer skin, and tends to increase slowly over the years.

There are no symptoms beyond the spots themselves: no itch, no scale, no discomfort.

What to do: No treatment is needed medically. Because it is linked to cumulative sun exposure, daily sun protection is sensible both for the skin generally and to limit new spots. Cosmetic treatments exist if the appearance bothers you, but it is not something that needs fixing for health reasons.

What deficiency causes white spots on the skin?

This is one of the most common questions about white spots, and the honest answer is that, for the conditions above, a vitamin deficiency is usually not the cause. Tinea versicolor is a yeast issue, vitiligo is an autoimmune loss of pigment cells, milia are trapped keratin, and sun spots are UV-related. None of these is fixed by taking a supplement.

There are a few genuine nutritional links worth knowing. Severe vitamin D or vitamin B12 deficiency, and in some cases low calcium, have been associated with pigment changes, and vitiligo is sometimes linked with other autoimmune and nutritional issues, which is one reason a GP may run blood tests. But white spots are far more often caused by the everyday conditions on this page than by diet. Buying supplements off the back of an online self-diagnosis is rarely the answer; if you are concerned about a deficiency, ask a GP rather than guessing.

Can a white spot on the skin be cancerous?

White spots themselves are very rarely a sign of skin cancer. The common causes of pale patches and bumps, including milia, vitiligo, tinea versicolor and sun spots, are benign. Skin cancers more often present as a new or changing mole, a sore that will not heal, a scaly or crusted patch, or a lump, rather than a plain white spot.

That said, two situations always deserve a prompt check: a pale or white area appearing within, or right next to, an existing mole, and any spot, of any colour, that is changing in size, shape, colour or border. Those are not features of the harmless conditions here, so get them looked at rather than assuming. When in doubt, a GP assessment is quick and reassuring.

How to tell them apart: a quick decision guide

You cannot self-diagnose perfectly, but you can usually get close with a few questions:

• Is it a raised, firm bump? Think milia (especially around the eyes), or a whitehead if it is softer and acne-prone.
• Is it a flat, slightly scaly patch on the face or arms, mostly in a child? Pityriasis alba is likely.
• Is it flat patches with fine scale on the chest, back or shoulders, more obvious after sun? Tinea versicolor fits.
• Is it a sharply defined, truly white, smooth patch that is spreading, often symmetrical? This points towards vitiligo and is worth a GP visit.
• Are they small flat white dots on the shins or forearms in older or sun-exposed skin? Most likely the harmless sun-related type.

Photos: how to actually compare

Online photo galleries can mislead, because lighting, skin tone and camera quality change how a patch looks. A few practical pointers when comparing what you see to images or showing a clinician:

• Use natural daylight, not a yellow indoor bulb, which shifts colours.
• Stretch the skin gently. Vitiligo stays a flat, even white; scaly conditions reveal fine flakes when stretched or lightly scratched.
• Take a dated photo every few weeks. The single most useful piece of information is whether a patch is stable, spreading or fading, and a photo timeline answers that better than memory.
• Compare both sides of the body. Symmetry (matching patches left and right) leans towards vitiligo; a single isolated patch is more often something else.
• Note texture, not just colour. Raised versus flat, smooth versus scaly, tells you more than the exact shade of white.

If you do show photos to a GP or use a remote skin service, daylight images plus a short note on how long it has been there and whether it is changing will make the assessment far more useful.

When to see a GP or dermatologist

Most white spots do not need urgent attention, but book an appointment if any of the following apply:

• A patch is spreading, growing or clearly changing over weeks.
• You have well-defined, truly white patches (especially symmetrical ones) and want them assessed for vitiligo.
• Patches are itchy, scaly, sore or inflamed, or are not settling with over-the-counter care.
• A pale area appears within or next to an existing mole, or any spot is also changing in size, shape, colour or border. Changes in a mole should always be checked promptly.
• The white spots are affecting your confidence or wellbeing. That is a valid reason to seek help, not a minor one.
• Treatments from a pharmacy have not worked after a reasonable trial.

A GP can diagnose most of these conditions, treat the straightforward ones, and refer you on to a dermatologist where needed. Some causes (a suspected fungal cause, or vitiligo) may benefit from a dermatologist’s input for confirmation and treatment planning. If you are unsure how to access dermatology care, our guide to how to see a dermatologist in the UK covers NHS referral routes and going private.

Frequently asked questions

The bottom line

Most white spots are harmless, but they are not all the same, and the right response ranges from “leave it alone” to “see a GP.” Use texture (raised versus flat, smooth versus scaly) and behaviour (stable versus spreading) to work out the likely cause, take a dated photo to track any change, and get a professional opinion if a patch is spreading, scaly and stubborn, or appearing in or near a mole.

This is general information, not medical advice. See a GP or dermatologist about your own skin.

Sources

• NHS: Vitiligo; Pityriasis versicolor; Milia
• British Association of Dermatologists: patient information leaflets on vitiligo and pigmentation disorders
• DermNet: milia, pityriasis alba, pityriasis versicolor, idiopathic guttate hypomelanosis, vitiligo
• NICE: Clinical Knowledge Summaries on pityriasis versicolor and vitiligo
• Primary Care Dermatology Society: guidance on common pigmentary skin conditions
• UK clinic price pages, accessed June 2026: sk:n Clinics, Harley Street Skin Clinic, Cosmedics (milia removal indications; cited as examples, not endorsements)