Hi, I have noticed several lumps around my body and arms. They seem to be fairly firm and some moveable, others not. They vary in size and appear at the base of my sternum, just under my rib cage on my left side, a small, but firm one near the pit of my elbow. They are not painful until pressed and I have had them for approximately 12 months. They don't seem to be growing but in the past week I have noticed a dull ache in my left arm and also a strange numb feeling in the same area. I am not panicking about this but was just curious as to whether it may be something I should urgently seek medical attention for.