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What is a Wood's light exam?

Dr. Jeanne Morrison, PhD
Family Practitioner
In a Wood's light exam, the doctor uses an ultraviolet light to check your skin for infections or other disorders. Vitiligo can be diagnosed by its appearance, and a Wood's light exam can help the doctor distinguish between differences in areas of the skin. It can also help detect pigment disorders like vitiligo in fair-skinned people because the ultraviolet light makes differences in pigment (melanin) easier to see.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.