I have recently noticed 3 movable, painless, spherical lumps, they are all fairly small, the largest is about the size of blueberry, there is one on the lefthand side of my jaw line, one is at the top of my neck under the hinge of my jaw bone (the largest) and there is another on my throat, i have no other symptoms and they are not visible from the surface of the skin, you can only feel them if you apply pressure. I am 16 and have no other health problems, any ideas?