Light patches: pityriasis alba, vitiligo and tinea versicolor

What it is

Pale patches have several causes. Pityriasis alba gives faint, slightly dry, pale ovals on the face and arms, mostly in children. Vitiligo causes milk-white, sharply edged patches where pigment cells have been lost. Tinea (pityriasis) versicolor is a yeast overgrowth giving small lighter or darker, finely scaly patches on the chest, back and shoulders.

How it works

Light patches happen when pigment cells make less melanin, are temporarily disturbed, or are lost. In pityriasis alba, mild eczema disturbs pigment transfer. In tinea versicolor, a yeast on the skin produces a substance that slows melanocytes. In vitiligo, the immune system attacks and destroys melanocytes, so patches become completely white.

Why it matters on darker skin

On darker skin the contrast is very visible, so even mild pityriasis alba is noticeable. Heat and humidity encourage the yeast that causes tinea versicolor. Vitiligo affects all skin types equally but is more visible, and carries stigma in many communities.

Causes and triggers

Dry skin and eczema (pityriasis alba), heat, sweat and oily skin (tinea versicolor), and autoimmune tendency or family history (vitiligo). Previous injury or inflammation can also leave lighter areas.

What helps — and why it works

Pityriasis alba: gentle soap-free cleansing, regular moisturiser and sunscreen; it fades with time. Tinea versicolor: pharmacy antifungal shampoos or creams used as directed; colour takes weeks to months to even out after the yeast is cleared. Vitiligo: early medical treatment gives the best chance of repigmentation, and sunscreen protects the white patches from burning. Moisturise dry, pale patches: pityriasis alba is a mild eczema; restoring the barrier lets pigment return. Expected timeline: weeks to months; colour returns gradually. Antifungal wash for tinea versicolor: selenium sulfide or ketoconazole reduce the yeast; colour returns once yeast is controlled. Expected timeline: scaling settles in 2–4 weeks, colour in months. See a doctor for completely white patches: vitiligo needs confirmation and early treatment works best. Expected timeline: treatment response is judged over 3–6 months. Sun protection: tanning surrounding skin makes patches more obvious, and white patches burn easily. Expected timeline: immediate.

What to avoid and why

Avoid scrubbing or bleaching around pale patches to "blend" them. Do not use steroid creams without advice. Avoid herbal pastes that can cause contact dermatitis.

Common mistakes

• Assuming all light patches are 'fungus' and using antifungals for months without improvement.
• Using bleaching creams to 'even out' the patch, which lightens surrounding skin too.
• Scrubbing patches hard.

Building a routine that lasts

Most skin problems improve with a short routine used every day rather than many products used occasionally. A practical base is a gentle cleanser, a fragrance-free moisturiser and a broad-spectrum sunscreen in the morning, with one targeted treatment at night. Introduce one new product at a time and give it two weeks before adding another, so that if your skin reacts you know the cause. Patch-test on the inner arm or behind the ear for a few days first. Skin renews itself roughly every four to six weeks, so most treatments need two to three cycles — eight to twelve weeks — before you can judge them fairly. Photographs taken in the same light every four weeks are more reliable than memory. In the Nigerian climate, heat, humidity and harmattan all change what your skin needs: lighter gels in the humid season and richer creams in dry months are both reasonable. If a product stings for more than a few minutes, causes swelling, or leaves new dark patches, stop it. Buy from registered pharmacies or official stockists, and use the Authenticity Check if you are unsure whether a product is genuine.

Reading labels and choosing products

On the label, look first for the active ingredient and whether the product is fragrance-free and non-comedogenic. Ingredients are listed in order of amount, so an active at the end of a long list may be present only in a small quantity. Be wary of products that promise results in days, that list no ingredients, or whose label is a sticker or handwritten. Words such as 'natural', 'herbal', 'organic' and 'dermatologist-inspired' are marketing terms, not safety standards. Hydroquinone, mercury compounds (sometimes listed as calomel or mercurous chloride) and strong steroids such as clobetasol do not belong in an over-the-counter cosmetic. A real NAFDAC registration number should be printed on the pack and should match the product on the official Greenbook register. Price is not proof: counterfeiters copy expensive brands. When in doubt, ask a pharmacist, keep your receipt, and use Melanin & Me's Authenticity Check and barcode scanner as a first screen.

Questions to ask your doctor or pharmacist

Useful questions include: What do you think is causing this? Is it likely to come back, and how can I prevent it? Which products should I stop? How long before I should expect improvement, and when should I come back if it isn't better? Are there side effects to watch for? Is this treatment safe if I am pregnant, breastfeeding or for my child? Writing your questions down, bringing your products (or photos of their labels) and taking dated photos of the problem make an appointment much more useful.