White spots on the face are almost always caused by a loss or reduction of melanin, the pigment that gives skin its color. The most common culprits are a mild skin condition called pityriasis alba, a harmless fungal overgrowth called tinea versicolor, or, less commonly, vitiligo. Which one you’re dealing with depends on the size, texture, and behavior of the spots.
Most causes are harmless and treatable. Here’s how to tell them apart.
Pityriasis Alba: The Most Common Cause in Kids and Teens
If you’re a parent noticing pale, slightly scaly patches on your child’s cheeks, pityriasis alba is the most likely explanation. It’s considered a mild form of eczema and typically shows up in children between ages 3 and 16, with 90% of cases occurring before age 12. The patches are not pure white. They’re lighter than the surrounding skin, often with a faint dry or flaky texture that comes and goes.
The condition tends to be more noticeable in summer. As the surrounding skin tans, the contrast between normal skin and the lighter patches becomes more obvious, which is often what prompts parents to search for answers. The patches themselves aren’t damaged or scarred. They simply produce less pigment temporarily. Once the scales heal, the lighter areas usually fill back in on their own over weeks to months, though the cycle can repeat. Keeping the skin moisturized and protected from sun helps reduce both the dryness and the visible contrast.
Tinea Versicolor: A Fungal Overgrowth
Tinea versicolor (also called pityriasis versicolor) is caused by Malassezia, a yeast that naturally lives on everyone’s skin, particularly in oily areas like the face, scalp, and back. Normally it causes no problems. But when it shifts into an overgrowth state, it produces a substance that interferes with your skin’s pigment cells, leading to lighter (or sometimes darker) patches.
The patches are well-defined, oval, and may appear slightly scaly. One reliable clue: if you gently scratch or stretch the skin over a patch, fine flaking appears. This is called the “evoked scale sign,” and it’s a hallmark of tinea versicolor. On lighter skin, the patches tend to look light brown or pinkish. On darker skin, they can appear noticeably pale or even grayish. Hot, humid weather and oily skin make overgrowth more likely.
Tinea versicolor is not dangerous or contagious. Antifungal treatments, including over-the-counter antifungal shampoos used as a face wash or topical creams, typically clear the infection within a few weeks. The pigment, however, can take longer to even out. Even after the fungus is gone, the lighter spots may remain visible for a month or two until your skin gradually restores its normal color.
Vitiligo: True White Patches
Vitiligo is different from the conditions above in one key way: the patches are completely white, not just lighter than surrounding skin. This happens because the immune system attacks and destroys melanocytes, the cells that produce pigment. The result is milky-white, well-defined patches with smooth, convex borders and no scaling or texture change. The skin feels completely normal, just colorless.
Vitiligo patches can appear anywhere, but the face, hands, and areas around body openings are common starting points. Unlike pityriasis alba or tinea versicolor, vitiligo patches tend to expand over time and may cause the hair within the patch to turn white as well. It’s associated with other autoimmune conditions like thyroid disease.
If your spots are stark white with sharp edges and seem to be growing, that pattern points toward vitiligo. A dermatologist can confirm the diagnosis using a Wood’s lamp, an ultraviolet light that makes truly depigmented skin glow bright white, while merely lighter skin does not.
Sun Damage Spots (Idiopathic Guttate Hypomelanosis)
If you’re an adult noticing tiny white dots, each about 2 to 5 millimeters across, scattered on sun-exposed skin, you’re likely looking at idiopathic guttate hypomelanosis (IGH). These spots result from years of cumulative UV exposure gradually reducing the number of pigment-producing cells in small, localized areas. They’re extremely common in adults over 40 and become more numerous with age.
IGH spots are flat, round or oval, and porcelain-white. They’re most frequently found on the shins and forearms, but they can appear on the face and chest too. They don’t itch, scale, or change in texture. They’re purely cosmetic and completely benign. Once they appear, they tend to be permanent, though consistent sunscreen use can help prevent new ones from forming.
Other Possibilities
A few less common causes are worth knowing about. Nevus depigmentosus is a type of birthmark that appears within the first few months of life as a lighter patch with jagged edges. Unlike vitiligo, it doesn’t grow or spread over time. Nevus anemicus is another common birthmark that looks lighter than surrounding skin but actually has normal pigment. The lighter appearance is caused by reduced blood flow to that area of skin, not a lack of melanin.
Post-inflammatory hypopigmentation can also leave lighter spots on the face after eczema, psoriasis, or acne heals. The pigment cells get temporarily disrupted by inflammation, and the affected skin looks pale until the cells recover. This is more noticeable in darker skin tones and usually resolves on its own over several months.
How to Tell the Difference
A few quick observations can help you narrow down what you’re seeing:
- Texture matters. If the spots are slightly scaly or flaky, pityriasis alba or tinea versicolor are the most likely causes. If the skin feels completely smooth and normal, think vitiligo or IGH.
- Color intensity. Spots that are lighter than your skin but still have some color are hypopigmented. Spots that are stark, milky white with no pigment at all are depigmented, which points toward vitiligo.
- Size and shape. Tiny round dots (2 to 6 mm) suggest IGH. Larger, irregular patches suggest vitiligo or pityriasis alba. Oval patches with fine scaling suggest tinea versicolor.
- Age. White spots on a child’s cheeks are most often pityriasis alba. New small white dots appearing in a middle-aged or older adult are likely IGH. Vitiligo can start at any age but often begins before 30.
- Spread. Spots that are slowly expanding or multiplying over weeks to months warrant a dermatologist visit, as this pattern is more consistent with vitiligo.
Most white spots on the face are harmless and either resolve on their own or respond well to simple treatments. The main exception is vitiligo, which benefits from early treatment to slow progression and help restore pigment while the condition is still limited in area.