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Causes
By Mayo Clinic staffBoils usually form when one or more hair follicles — the tube-shaped shafts from which hair grows — become infected with staph bacteria (Staphylococcus aureus). These bacteria, which normally inhabit your skin and sometimes your throat and nasal passages, are responsible for a number of serious diseases, including pneumonia and endocarditis — an infection of the lining of your heart. They're also a major cause of hospital-acquired infections.
Staph bacteria that cause boils generally enter through a cut, scratch or other break in your skin. As soon as this occurs, specialized white blood cells called neutrophils rush to the site to fight the infection. This leads to inflammation and eventually to the formation of pus — a mixture of old white blood cells, bacteria and dead skin cells.
- Habif TP. Furuncles and carbuncles. In Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 5th ed. Edinburgh; New York, N.Y.: Mosby Elsevier; 2009. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-0-7234-3541-9..00018-3--s0295&uniq=215950578&isbn=978-0-7234-3541-9&sid=1042832232. Accessed Aug. 23, 2010.
- Baddour LM. Skin abscesses, furuncles, and carbuncles. http://www.uptodate.com/home/index.html. Accessed Aug. 23, 2010.
- Rakel RE. Furuncles and carbuncles. In: Rakel RE. Textbook of Family Medicine. 7th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/215950578-5/1042832232/1481/236.html#4-u1.0-B978-1-4160-2467-5..50024-5--cesec94_966. Accessed Aug. 23, 2010.
- Tree tea oil. Natural Medicines Comprehensive Database. http://www.naturaldatabase.com/(S(iyok1uyiw1fl112ek3ax2lu2))/nd/Search.aspx?cs=MAYO&s=ND&pt=100&id=113&fs=ND&searchid=11129198. Accessed Aug. 23, 2010.
- Personal prevention of MRSA skin infections. Centers for Disease Control and Prevention. http://www.cdc.gov/mrsa/prevent/personal.html. Accessed Aug. 23, 2010.
- Archer GL. Staphylococcal infections. In: Goldman L, et al. Cecil Medicine. 23rd ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/130655031-2/826443940/1492/1112.html#4-u1. Accessed Aug. 23, 2010.
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