Sun Spots vs Freckles on Dark Skin What's the Difference? BGS 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 people, certain Freckles vs. Moles: Differences and Similarities How I permanently removed my freckles and moles Melanotan & PicoWay Laser Melanotan What It Is and Its Relation to Skin Cancer