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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Is The Lump On Back Of Knee Oozing White Substance?

I have a bump under the skin on the back of my knee...it has been getting bigger for some time now. But today I noticed that some white stuff is coming out of it. Lump is going down now the that stuff is coming out, but what is it? And white stuff stinks.

Mon, 23 Jun 2014
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Pain Medicine & Palliative Care Specialist 's  Response
Hi,
This is likely to be a sebaceous cyst that has burst. It may be infected which is why there is a smell. I suggest you let it drain and apply some antibiotic cream to the area. It is likely to improve over the next 3 to 4 days.
Regards,
Dr K A Pottinger
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What Is The Lump On Back Of Knee Oozing White Substance?

Hi, This is likely to be a sebaceous cyst that has burst. It may be infected which is why there is a smell. I suggest you let it drain and apply some antibiotic cream to the area. It is likely to improve over the next 3 to 4 days. Regards, Dr K A Pottinger