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A 48-year-old female asked:

I had a cyst on my shoulder for fifteen years.. just a hard knot.. three weeks ago it burst..leaked thick puss like fluid.. now leaking blood..i ?

1 doctor answer1 doctor weighed in
Dr. Cathleen London
Family Medicine 27 years experience
Sebaceous cyst: This sounds like a sebaceous cyst that is now draining. The blood is actually serosanguinous - what your body puts into hollow spaces to fill the void. If it does not stop draining on its own please go get seen.
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Last updated Apr 30, 2015

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