Thank you for your question. Each patient is different with how they tolerate pain but because no muscle work is performed for breast reduction surgery, it not normally not considered a "painful" surgery. You will have pain medication prescribed to you by your surgeon to use after surgery. Best Wishes!
In general, a breast reduction is not painful. Most patients are kept comfortable with pain medication and usually only need it for a couple of days. Many of my patients have commented that they feel immediate relief after surgery from back, and neck pain, which more than makes up for any temporary discomfort from the surgery.