A member asked:

I have a friend who have boils spots on back an buttocks, some inflammed. can u tell me how and y these come about?

7 doctors weighed in across 2 answers

From bacteria: Most 'boils' are due to staphylococcus bacteria infecting the skin.Pus forms below the skin which swells to form a painful boil.Sometimes streptococci & pseudomonas may cause boils.Often the 'boil' can be cured by a special drainage procedure performed by your doctor.If the surrounding area is red & angry antibiotics are needed. If untreated the infection can spread to the blood & become dangerous.

Answered 4/25/2016

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May be acne: These may be acne with blocked hair follicles that develop purulent inflammation.

Answered 6/12/2012

5.8k views

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