I had a breast reduction October 2016 and for the past week around my right nipple is tingling. Is this normal?

Tingling around the nipple/areolar complex after breast reduction is common and normal.  Especially if there are no other changes with the breast.  It is a sign of healing of small sensory nerves to the skin.  Nerves heal very slowly and this explains why you are having these symptoms a year after surgery.  If it doesn't go away or it gets worse or painful you should be examined by your surgeon.  I hope this helps.
Dr. Smart