Skin Science

Pigmentation vs Acne Marks vs Sun Spots: What’s...

Pigmentation is a broad term. Acne marks commonly refer to post-inflammatory hyperpigmentation after inflammation, while sun spots are localized pigmentation associated with cumulative sun exposure. Compare acne marks, then continue...

What Causes Acne Marks? A Science-Based Guide t...

Acne marks are usually flat color changes left after inflammation, often called post-inflammatory hyperpigmentation (PIH). They are different from acne scars. Start with the pigmentation comparison guide, then see how...