I have a lump, on the back of my right leg, right under the cheek of my butt, you can feel the lump under the skin, but it also has a soft ( head) that purtrudes outside of my leg,, it doesn't hurt, never even know it's there, unless I feel of it, but its ugly, looks like a nipple on the back of my leg,, could you give me some suggestions as to what it might be? I am a female, 56, Thank you