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I found a lump under the skin on my left leg above the back of my knee on the back side of my leg. The lump is hard I can move it from side to side a little. I do not know how long I have had it. It does not hurt. My legs do not hurt. I do have diabetes and high blood pressure but it has been very low for the last year. I have been in Ukraine for the past 17 months, I do a lot of walking and eating better. I came with 90 days worth of pills and still have about 30 days worth left. I am much more healthier being here.

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replied May 20th, 2010
Skin Answer A12252
Hi, and thanks for your medical question on eHealth forum!

Well, the lump you have could be a cyst and as is more towards the back of the knee, then it can be a Baker’s cyst or a popliteal cyst. The other possible cysts are sebaceous cysts which occur due to blocked sebaceous glands.

The other possibility is a ganglion. This can arise due to repetitive use of joint or due to rheumatoid arthritis or sometimes without a cause too. It is usually a swelling in the tendon of a muscle. Since you are walking a lot now, this could be a cause.

It can also be a swollen lymphnode if you have an injury in leg or a skin rash or eczema near by.
Since a confirmed diagnosis cannot be given on net please discuss these possibilities with a doctor. Hope this helps. Take care!

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