(HealthDay News) -- Acne forms when hair follicles are blocked by dead skin and oil. Bacteria then begin to grow and irritate the skin.
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Pimples typically occur on the face but can also surface on the back, chest, neck and arms.
The American Academy of Family Physicians mentions these common triggers for acne:
- Hormonal changes during puberty, before a woman's menstrual cycle or during pregnancy.
- Certain medications.
- Cosmetics, especially oil-based products, suntan lotion and hair products.
- Picking or squeezing existing pimples.
- Scrubbing your skin too harshly.
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