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  1. Acne - Symptoms and causes - Mayo Clinic

    Jul 20, 2024 · Acne is a skin condition that occurs when your hair follicles become plugged with oil and dead skin cells. It causes whiteheads, blackheads or pimples. Acne is most common …

  2. Acne: Types, Causes, Treatment & Prevention - Cleveland Clinic

    Jan 4, 2023 · Acne is a common skin condition that causes pimples on your skin. These usually form on your face, chest and back. Treatment helps clear acne.

  3. Acne | Blackheads | Pimple | Zits | MedlinePlus

    Oct 12, 2024 · Both teens and adults can get acne. Learn what causes pimples and blackheads and how to manage them.

  4. Acne - Wikipedia

    Acne ... Acne, also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. [10]

  5. Acne Types, Causes, & Risk Factors | NIAMS

    Acne is a common skin disorder that results in blocked skin follicles. Learn the types & causes of acne.

  6. Acne - Johns Hopkins Medicine

    Acne affects teens and adults of all ages. It occurs when oil secreted by sebaceous glands clogs the hair follicle. Bacteria infect the clogged follicle and cause pimples.

  7. Acne Causes: What Is Acne and Why Do I Have It? - WebMD

    Apr 27, 2025 · Contrary to popular belief, acne isn't caused by a harmful diet, poor hygiene, or an uncontrolled sex drive. The simple truth is that heredity and hormones are behind most forms …

  8. Acne Resource Center - American Academy of Dermatology

    Here, you'll find dermatologists' expertise about acne treatment and skin care that you can use at home, along with guidance to figure out when you need to see a dermatologist for clearer skin.

  9. Acne - Skin Disorders - Merck Manual Consumer Version

    Acne is a common skin condition causing pimples and other abnormalities on the face and upper torso. Acne is caused by a buildup of dead skin cells, bacteria, and dried sebum that blocks …

  10. Why Do I Have Inflamed Acne and How Should I Treat It?

    Dec 20, 2025 · Inflamed acne is the opposite of a blackhead, which stays within the pore. With inflammation, acne is red, swollen, and lumpy. Find treatments here.