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What kinds of bacteria cause pimples?

Diana Meeks
Diana Meeks on behalf of Sigma Nursing
Family Practitioner

The bacteria that cause pimples are called Propionibacterium acnes, or P. acnes for short. These bacteria live on your skin all the time. They become a problem only when a pore becomes blocked. This happens when excess oil or sebum mixes with dead skin cells to form a "plug." The bacteria build up in the oil inside the blocked pore. The body responds by sending cells to kill the bacteria, causing the pore and surrounding skin to swell and creating the little red bumps with white centers known as pimples.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.