What are open comedones commonly known as?

Open comedones are commonly known as blackheads. They are formed when hair follicles become clogged with sebum, dead skin cells, and other debris. The key characteristic that differentiates blackheads from other types of comedones is their exposure to air. When the material inside the follicle is oxidized, it turns dark, giving blackheads their distinctive appearance.

In the context of skin anatomy and physiology, understanding the formation and appearance of blackheads is crucial for recognizing how acne and other skin conditions develop. Blackheads are typically non-inflammatory lesions, allowing for effective management through topical treatments that aim to unclog the follicles and reduce excess oil production.