Leukoderma is a broad term for any loss of normal skin color that produces white or light patches on the body. It is not a single disease but rather a visible result of reduced or absent melanin, the pigment that gives skin its color. The most common form is vitiligo, an autoimmune condition affecting 0.5 to 2% of the global population, but leukoderma can also develop after skin injuries, chemical exposure, infections, or inflammatory skin conditions.
How Skin Loses Its Color
Skin color comes from melanocytes, specialized cells in the bottom layer of the epidermis that produce melanin. Leukoderma appears when these cells are destroyed, damaged, or stop functioning properly. In vitiligo, the immune system’s own T cells attack and kill melanocytes, leaving behind patches completely devoid of pigment. In chemical leukoderma, certain compounds directly poison melanocytes or trigger a chain of internal stress responses, including the buildup of hydrogen peroxide and toxic byproducts, that ultimately cause the cells to die.
Melanocyte loss isn’t always about cell death, though. Some triggers cause melanocytes to detach from the membrane they normally anchor to at the base of the epidermis. Once unmoored, these cells drift toward the skin surface or deeper into the dermis and eventually disappear. Others cause melanocytes to lose their mature identity in a process called dedifferentiation, where the cells stop expressing the markers needed to produce pigment. The end result looks the same on the surface: a pale or white patch where color used to be.
Types and Causes
Leukoderma falls into several categories depending on what triggers the pigment loss.
Vitiligo
Vitiligo is the most recognized form. It’s an autoimmune condition in which the body’s immune cells specifically target melanocytes. It often begins before age 30 and can appear anywhere on the body, though it commonly affects the face, hands, and areas around body openings. The patches tend to be symmetrical, meaning if one appears on the left hand, a similar one often develops on the right.
Chemical Leukoderma
Repeated exposure to certain chemicals can trigger depigmentation that looks virtually identical to vitiligo, especially in people with a genetic susceptibility. The most common culprits are derivatives of phenol and catechol, chemicals widely used in industrial and consumer products. Rubber manufacturing chemicals, hair dyes containing paraphenylenediamine, adhesives in decorative bindis, and even some shoe materials have all been documented as triggers. Phenolic detergent germicides, hydroquinone-based skin products, and preservatives in leather goods round out the list. The depigmentation typically starts at the site of contact and can spread to distant areas over time.
Post-Inflammatory Leukoderma
Skin inflammation from conditions like psoriasis, eczema, discoid lupus, lichen sclerosus, or even common fungal infections like pityriasis versicolor can leave behind lighter patches once the inflammation clears. This form, called post-inflammatory hypopigmentation, is particularly visible in darker skin tones. It can also follow dermatologic procedures, burns, or physical trauma to the skin. In most cases, the melanocytes are still present but temporarily underperforming rather than destroyed, which means the color often returns over months.
What the Patches Look and Feel Like
Leukoderma patches are flat, not raised or textured. The skin itself feels normal to the touch. In vitiligo and chemical leukoderma, the patches are strikingly white with sharp edges. In post-inflammatory cases, they tend to be off-white or lighter than the surrounding skin but not completely devoid of color. Chemical leukoderma often produces a distinctive pattern of small, confetti-sized spots alongside larger patches, particularly near the area of chemical contact.
Under a Wood’s lamp, an ultraviolet light used in dermatology offices, the differences become clearer. True depigmentation (vitiligo, chemical leukoderma) glows a bright blue-white because no melanin is present to absorb the light. Hypopigmented conditions, where some melanin remains, produce a duller, off-white glow. This simple exam helps distinguish between complete pigment loss and partial pigment reduction, which matters for prognosis and treatment planning.
Skin Cancer Risk Is Lower Than Expected
A common worry among people with leukoderma is that their depigmented skin, now lacking melanin’s natural sun protection, faces a higher cancer risk. The reality is surprisingly reassuring. Multiple large studies have found that people with vitiligo actually have a lower risk of skin cancer than the general population. A UK study of over 15,000 vitiligo patients matched against more than 60,000 controls found a 38% decreased risk of new skin cancer, including both melanoma and non-melanoma types. An Italian study of over 10,000 vitiligo patients observed a similarly reduced incidence. The leading theory is that the same overactive immune response that destroys melanocytes may also be unusually effective at eliminating precancerous skin cells.
That said, depigmented skin still burns more easily in the sun since melanin normally absorbs UV radiation. Sunscreen on exposed patches remains practical for comfort and preventing sunburn, even if the cancer risk is paradoxically low.
How Leukoderma Is Treated
No treatment currently cures vitiligo or most other forms of leukoderma. The goal is repigmentation: coaxing color back into the white patches. Dermatologists typically start with the gentlest options and layer on additional treatments if needed. When treatment does work, the returned color can fade over time, so many people continue maintenance therapy to preserve their results.
Topical Treatments
Prescription creams that calm the local immune response are a first-line approach, particularly for patches on the face and neck. These creams work best on facial skin, where repigmentation rates are highest. In studies of children with vitiligo, face and neck patches responded well in roughly 65 to 100% of cases depending on the specific regimen, while patches on the hands and feet proved more stubborn. Combining topical treatment with consistent self-care helps many people maintain whatever color returns.
Phototherapy
Narrowband UVB phototherapy is one of the most effective treatments for widespread leukoderma. Sessions are typically scheduled two to three times per week. Starting at three sessions per week for the first three months produces faster initial results, though over time, two sessions per week catches up to the same effectiveness. The light dose is gradually increased at each visit until mild, short-lived pinkness develops, which signals that the therapeutic range has been reached. From there, the dose is held steady and reassessed every 6 to 12 weeks. Repigmentation usually begins on the face first and takes longer on the extremities.
Combining phototherapy with topical creams can improve outcomes. In one analysis, adding a topical immune-calming cream to excimer laser sessions (a more targeted form of UV therapy) significantly increased the proportion of patients achieving at least 50% repigmentation compared to laser treatment alone.
Surgical Options
For stable patches that haven’t responded to other treatments, melanocyte transplantation is an option. The procedure involves taking a small sample of normally pigmented skin, separating the melanocytes and other key skin cells, and transferring them to the depigmented area. Success depends heavily on patient selection: the leukoderma needs to have been stable (no new or expanding patches) for at least a year, and certain body areas respond better than others. This approach requires significant technical skill and is typically reserved for cases where other treatments have fallen short.
Chemical Leukoderma Requires Source Removal
If leukoderma is triggered by chemical exposure, identifying and eliminating the offending substance is essential before any repigmentation treatment can succeed. This can be surprisingly tricky because the chemicals responsible appear in everyday items: rubber gloves, hair dye, adhesive tape, leather watch straps, spectacle frames, certain cleaning products, and even some skincare ingredients. Depigmentation sometimes continues spreading for weeks or months after exposure stops, since the immune activation triggered by the chemical can take on a life of its own. Once the source is removed and the immune response settles, the same phototherapy and topical treatments used for vitiligo can help restore color.