What's the recovery time for excision of bilateral axillary breast tissue? How restricted will arm movement be and for how long?

Breast reduction will make the upper back, neck and shoulders feel better. Sometimes the changes in posture can help alleviate lower back as well. It looks like you are a good candidate for a reduction and will,definitely receive a great benefit from it. It may not help the from the stenosis though.

That's all I need to say! You are most likely,suffering from back, shoulder and neck discomfort. Which will be immediately and permanently improved with a eduction. You also get an tremendous aesthetic improvement as well!

You are young for this and your breasts might still be growing (sorry!), but a fact. If you had a reduction now, there is a chance your breasts may enlarge again, where another reduction might be needed. When your bra size has not changed and you have not gained any weight, for a year, then...

Breast reduction will alleviate pain and strain on your shoulders. It will not reduce the dimensions or broadness of them

This is most likely a reult of how your arms were positioned and secured during surgery. Your radial nerve most likely was compressed at the wrist which can do this. It should get better in two weeks. Let your surgeon know about this.