Final answer:
Follicles impacted with solidified sebum and dead-cell buildup produce acne, which is caused by overactivity of sebaceous glands and can lead to blocked hair follicles. Maintaining good hygiene can help prevent acne, but bacterial infections may also play a role in its development.
Step-by-step explanation:
Follicles impacted with solidified sebum and dead-cell buildup produce acne. Acne is a result of the overactivity of sebaceous glands leading to blocked hair follicles. The blockage occurs due to an accumulation of sebum along with keratin, which can form a plug. Over time, the white plug may turn black upon oxidation when exposed to air. This condition often occurs during puberty but can persist into adulthood and may also occur in infants. Proper practice of hygiene including cleaning the skin daily with a mild soap may help prevent acne. In some cases, acne can result from bacterial infection, most commonly by Propionibacterium acnes, which can lead to redness and potential scarring