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This review compares the CO2 and Er:YAG laser treatments for acne scars, noting that while CO2 lasers offer deeper tissue penetration for severe scars, Er:YAG lasers pose a lower risk of post-inflammatory hyperpigmentation, and recommends personalizing treatments and considering combination therapies.

Fractionated laser therapy, especially erbium-glass laser, effectively increases hair thickness in people with hair loss but doesn't increase the number of hairs.

In this study, a 3-month treatment with a 2940 nm Er:YAG laser, combined with conventional therapy, effectively reduced microfibrosis around hair follicles and increased hair growth in the anagen stage among 85 men with androgenetic alopecia.

In this study, Er:YAG laser therapy initially improved the appearance of eruptive vellus hair cysts but was ultimately ineffective due to early recurrence and concerns about atrophy or scarring.

Er:YAG laser therapy effectively treats Hailey-Hailey disease, leading to long-term remission and improved quality of life.