Acne scars appear anywhere there is severe acne that causes tissue damage. This tissue damage arises from the inflammation of the sebaceous follicles becoming clogged with bacteria, dirt, and dead skin cells.
Oral retinoids are often used to treat more severe acne that isn't responding to other treatments. They cause the top layer of skin to peel which helps to unclog clogged pores. They also minimize the amount of sebum produced by the body, which is one of the factors that leads to acne.
When the follicles become blocked, acne will form. A plug of keratin and sebum will form in the follicle. When sebaceous glands grow at puberty, the sebum enlarges and forms a blackhead or a whitehead. Whiteheads are due to pores being clogged with sebum. Blackheads form due to the oxidation of keratin. Sebum is oil in the skin and, in combination with skin bacteria results in inflammation and pimples.
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