I have a Golf ball sized soft lump / swelling to my left ankle

I have a golf ball sized swelling / lump, on my left ankle. There is also a slight swelling to my right ankle. I have had these for a couple of years, infact I've never had slim ankles, they have always been thickset, but this lump is quite noticeable, to the extent that I have to wear boots, no matter how warm the weather, as I'm too self concious to wear shoes. I know people look at me when I go out in hot weather with boots on, but I'd rather they look at me as if I'm just a crazy person, than they see this lump, it's like an appendage. At times it aches, and feels stiff at times when I move my ankle in a circular motion. My feet are constantly cold, which is the excuse I use when people ask me why I have boots on when everyone else are wearing sandals.I've tried wearing a compression type bandage to cover it up, so I can wear shoes, and just feign an injury, but it looks worse, and draws more attention to it. I've tried diruretics, with no difference being made. A friend of mine some years ago had somehting similar, and she had to have it removed. I think it was a ganglion cyst, but I can't afford to take the time off work, as she was off for 6 weeks. The lump gets bigger in hot weather, and aches even more.It's really impacting on me, as I have to be so mindful of what I wear at all times, so no one sees it. I hate warm weather, and just pray for the summer to be wet and cool, so I can get away with wearing boots. Is there