I Am Getting Rhinoplasty Tomorrow, I Think I Am Getting a Cold Sore in my Nose. Will They Still Do the Surgery?

I am sorry to hear about your concerns prior to your day of surgery. Generally speaking, patients undergoing elective surgery should be at their optimal (or close to) level of health prior to proceeding. 
Your plastic surgeon will be the only relevant resource when it comes to determining your ability to proceed at this time.
Best wishes.

    Your plastic surgeon will examine you to determine if there is indication of infection.  Just make your surgeon aware of your concerns.  You can always have your operation on another day, although inconvenient.  Kenneth Hughes, MD Los Angeles, CA

If you have an active cold sore, the surgeon will most likely prefer to postpone the surgery.