Strip on nipple has lost colour and hardened, 6 weeks after breast lift - problem?

White and pink uniform colour changes to the areola and nipple after breast surgery are not uncommon and can reflect the same weather dependent changes that happen to non-operated breasts- especially in the cold of Canberra! But a single white line of 3mm thickness may be an ischaemic band of skin (area of poor blood supply). I would recommend asking your surgeon. 

It is unusual for the pink/red scars around the areola to have turned white already and it would be unusual to have had your nipples altered surgically during a mastopexy/lift. I am unclear as to what part of the nipple areola complex you are referring to and whether it is related to a scar or another process that is occurring.  If you have concerns always ask your PS. If you could post your photos I could give you a better opinion.

To have discoloration of the nipple or the areola 6 weeks after breast lift can be normal. Chances are the pigment will return. It can take months for this to happen. Be patient. I would definitely discuss it with your surgeon at your next appointment. Thank you.