Does UV light improve acne?

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EVIDENCE-BASED ANSWERModerate-to-severe facial inflammatory papular acne vulgaris improves slightly with narrow-band UVB treatment combined with oral azithromycin compared with oral azithromycin alone (SOR: B, small, unblinded RCT). The use of UVA or B light therapy alone or in combination with other medications may have no benefit (SOR: C, single low-quality, nonrandomized trial).

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