I have a small lump on my left leg calve muscle. Maybe the size of a marble. You can see it when I flex my calve. I noticed it a week ago and I want to say it s gotten bigger since I ve found it. It does not hurt. I m a 32 year old female. It s about 4 inches from the back of my knee. Possible idea you know what it could be?
It may be a lipoma. Is it mobile?  Does pus or any substance ooze out of it?  Then it may be a cyst, sebaceous or a Desmond cyst.