A couple of months ago I found a small little bump on the back of my neck. It's about 0.5cm or about the size of small pea. I thought it was a bug bite but it's still there. It hasn't grown in size at all but I'm wondering if I should be concerned about it.
I don't think it's a lymph node from looking at some diagrams of where the neck lymph nodes are located. The bump feels like it's on the trapezius muscle maybe about an 1.5" from the centerline of the neck. When I went to see a doctor last year about another lump on my butt, he said that unless a lump cannot be displaced or moved around it usually isn't cancerous. When I grab at my lump or poke at it, it can move along with the muscle or whatever it is attached to.
Is this something like a knot in a muscle or something? It doesn't hurt and I have no other somethings like fever, lethargy, weight loss, etc...