I have a hard bump on my back which feels like a knot, but its too hard to be a knot and feels more like a bone, i have been getting a sore and tense neck lately.. i have had this bumb for very long now and its starting to concern me.

Bump on the back : The "back" has a lot of normal hard bumps; from the spine called spinous processes, the sacrum (part of the back of the pelvis) has bumps as does the iliac crest. You can look at them on the internet. A tense neck should be evaluated in person. It can be from muscle tension, pinched nerves, arthritis, disc disease, infections, or emotional stresses.