Hi Kathy,
Yes, it sounds as though you are on track with the allergic reaction to the rabies shot and a hematoma developed thereafter and then became scar tissue.
You shouldn't have anything to worry about unless you see a major change on the area.
I hope this helps. If you need further information please feel free to contact me.
***If this answer was helpful, please go ahead and click ACCEPT and a BONUS is always welcome. Thank you, Tammy****
