Clinical Research Directory

Inclusion Criteria: * Aged 13 years old and above * Fitzpatrick skin types III or IV * Keratosis pilaris symmetrically affecting both upper outer arms Exclusion Criteria: * Other variants and subtypes of keratosis pilaris: atrophoderma vermiculatum, erythromelanosis follicularis faciei et colli, folliculitis spinulosa decalvans, keratosis follicular spinulosa decalvans, keratosis pilaris atrophicans, keratosis pilaris atrophicans faciei, and keratosis pilaris rubra * Received any laser treatment, systemic retinoids, or dermabrasion for KP or for other indications (e.g. acne) within the past 6 months * Received topical treatment (including emollients, keratolytic agents, retinoids, or corticosteroids) for KP within the past month * Underwent hair removal by waxing, threading, or plucking in the areas to be treated within the past month * History of keloids or hypertrophic scars * Presence of other skin diseases in the area to be treated * History of autoimmune or photosensitive diseases * Intake of topical or oral photosensitizing medications * Pregnant or lactating