I constantly have a knot behind my right shoulder blade, it moves when it is touched. is it muscle related? or should i have it checked out?

Lump near shoulder: There are a few possibilities. If it is painful and no lump or nodule is found then it can muscle spasms causing a knot. It could be a cyst or a lipoma which is a fat collection. If the size of it is greater than 1 cm or it has grown recently or has become more painful or it is causing other symptoms like numbness then i would have it evaluated.