When a clog or plug forms in the opening of your skin’s hair follicles, blackheads appear. Each follicle has one hair and an oil-producing sebaceous gland. Sebum, a type of oil, keeps your skin smooth. A comedo is a hump that forms when dead skin cells and oils gather in the entry to the skin follicle. The bulge is called a whitehead if the skin over it remains closed. When the skin over the bump opens, it turns black due to exposure to the air, and a blackhead appears.
1. Some of the common reasons for blackheads to appear are
2. Increased sebum production by the skin
3. The buildup of acne bacteria on the surface of skin
4. When dead skin cells are not exfoliated, the irritation on the follicles can lead to blackheads
5. Puberty hormones are also known to increase the number of blackheads
6. Skin products with certain ingredients can also greatly increase blackhead formation