A member asked:

Grandson has pimple-like outbreak behind one knee. hard encapsulated. they are painful at times. what could this be?

A doctor has provided 1 answer

Possibly boils: Hard, painful pimples suggest a localized skin infection usually caused by the bacteria staph aureus. A possible reason it is behind the knee is that your grandson may have eczema which is often behind the knee and makes one more susceptible to staph infections.

Answered 2/29/2016

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