Freckles develop when specific skin cells produce extra melanin in response to sunlight. When ultraviolet rays reach the skin, melanocytes release melanin to protect deeper layers from damage. In some PDF] Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar Sun Spots vs Freckles on Dark Skin What's the Difference? BGS Freckles, Birthmarks, and Moles: What's the Difference? Key West, FL Pigmentation Reduction and Removal Laser Clinics Australia