What is the best cream for breast reduction scars?

Best Scar Management is important to minimize or completely hide from view, the telltale signs of your surgery—namely, scars. Both you and your surgeon want you to have the most minimal scarring possible. There are many possible causes for scars that are enlarged or not healing well. Unsightly scars are most commonly due to genetics, underlying medical conditions, or improper scar/wound care. The last part is very important and patients can make a noticeable difference in their scars’ appearance by following best scar management practices

Scar creams don't work. Don't waste your money. Spend your efforts protecting the incisions from any irritant including clothing, ultraviolet light, or your fingers.Keep the skin well lubricated.

I recommend silicone gel for most people and silicone sheeting for those who have a strong tendency to make a thick scar. Time is the most important factor in scar quality. 

One of the best treatment is time, scars take up to one year to mature, the other is sunscreen so you don't burn them and darken them permanently.  As far as topical scar treatment, silicone strips are recommended for breast reduction scars.  Your PS probably sells them in the office, they are re-usable and easy to apply.

Congratulations on having had the breast reduction procedure; it is one of the most patient pleasing operations we perform.Time tends to improve the appearance of scars. You will find that the scars will improve in appearance even after a year has gone by. Your plastic surgeon will likely have his/her recommendations for you.Sometimes the use of silicone-based products (gel or sheeting) are helpful. In the event of unfavorable scarring steroid injection may be helpful.  Sometimes scar revision surgery and careful scar management afterwards may be helpful. Best wishes.