The hardness and tenderness you describe could indeed be old hematoma or even infection. And yes, returning to your caregiver is important to have this evaluated, no matter what "it is", at this point.
Looking back over your early post op history if you had this one area larger all along, more bruised, as well, then you could have hematoma. Did the right side ever look like the left or have they taken different courses from the beginning. Massage would not be appropriate until after consulting w/ your surgeon.
Infection would typically set in, after passing 10 days post op and would be accompanied by redness, tenderness to touch, and a fever by this point. If this is the case, please be seen quickly by your surgeon.
The other possibility is that there was some more trauma (more blood vessels broken for example...not a roughness in technique) to the area @ the time of surgery and the body, as it heals ANY surgical or non-surgical wound, is building more scar tissue in response to this. Scar tissue (collagen) is deposited beginning around 10 days post op and continuing to build out to 6 weeks post op. Internal scar tissue feels hard/firm to touch and can be tender initially. If this were to turn out to be scar tissue, then massage would be appropriate.
