Realistically, How Soon After a Breast Reduction Can I, a Hair Stylist, Return to Work?

You are absolutely right: The problems with breast reduction in a hair stylist is to hold the arms up to shampoo, color and cut hairs.

My hair stylist patients on an average need two weeks before being able to return to work if no complications occur. Than if you are "independent" enough with your work schedule start slow with clients you know need little "work" and maybe limit the number of clients daily  for another 10-14 days. If you need less recovery time even better but forcing yourself to work to early will make you sore, unhappy and ultimately your clients too.

In general, I instuct patients that they can go back to desk work within about a week. I have them limit aerobic exercise for 3-4 weeks and strenuous lifting/exercise for 6-8 weeks. You should probably modify your activity accordingly. Developing a hematoma often requires additional surgery.