If you are experiencing a medical emergency please dial 911 immediately
Pimples form when dead skin cells mix with excess oil (sebum). This mixture plugs the pore, causing swelling. Bacteria can grow in the mix and lead to infection and pus.
Last Revised: January 23, 2013
Author: Healthwise Staff
Medical Review: Kathleen Romito, MD - Family Medicine & E. Gregory Thompson, MD - Internal Medicine
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