Post-Inflammatory Hyperpigmentation (PIH): Why Dark Spots Linger — And What Actually Helps Fade Them
Post-inflammatory hyperpigmentation (PIH) is one of the most common skin concerns following acne, irritation, or minor injury. These marks are flat, smooth, and often brown or grayish in tone. Unlike scars, they do not represent structural damage to the skin. Instead, they reflect a temporary increase in melanin production triggered