Is this part of the skin breaking away from the nipple normal? (Photo)

This is a minor problem.  I agree with the use of antibiotic ointment to keep the area moist.  This is a very common (almost expected) issue after a breast reduction.   Be sure to discuss with your surgeon so he/she can assess other areas.I hope your back is thanking you and your surgeon for the relief of the reduction! 

Thank you for your question and picture.  It seems like a stitch may have come loose and now you have a minor separation in the incision.  Apply some type of topical antibiotic ointment and see your PS ASAP.  This will heal up final eventaully.  

Thanks for the question. Its early to talk about results .In my practice, after performing a BA I recommend to my patients to limit the movement of the arms for two weeks. After that, you can move your arms taking care and always with common sense. In this regard, it's not advisable to carry heavy weights to prevent the implant out of position, and allow the formation of the physiological capsule around the implant, also to avoid pain and breast swelling.Kind regards, DR. Emmanuel Mallol.-

It does look like you have a small skin separation along your nipple suture line.   This is not uncommon, and should heal on its own.  

Hello and congrats on your breast reduction.  You look like you have a small separation in your incision that should heal up fine with some simple wound care.  I typically recommend antibioitic ointment and a band-id until the small area contracts.  This can take several days to a week or so.  Minor wound healing problems are common with breast reduction and almost always heal without significantly affecting your cosmetic outcome.  Always best to follow-up with your surgeon, good luck!