Is it normal for the swelling to come and go have the Rhinoplasty? I am 3 1/2 weeks post surgery.

Recovery after rhinoplasty will vary based on the person, characteristics of the nasal tissues and what was done during surgery. It can take somewhere in and around 12-18 months to see the final results. The areas with thicker skin in the nose such as the tip, alar rims and radix will require longer to settle. Also there appears to be a linear decrease in swelling for the first several months followed by a period where the swelling fluctuates (sometimes little or no swelling and other times more swelling) before the nose settles. It's hard but important to stay patient during your recovery and to be diligent attending your follow-up appointments with your surgeon. You are still very early in your recovery and this will likely settle with time.

It is fairly normal for your nose to be swollen at this stage. You can expect it to react to all kinds of external factors such as temperature, sunlight or increased blood flow from exercise. If there is any pain or redness associated with the swelling, you should contact your surgeon immediately and get things checked out. Otherwise, be patient, it is early days and you have a long journey ahead of you until you get your final result. 

Yes.  It is perfectly normal and expected to have swelling which fluctuates after a rhinoplasty.  You can expect for this to happen for months after surgery.  You will notice your nose more swollen in the morning.  You may notice it more swollen after exercise.  And you will notice it more swollen if you are retaining water after a salty meal.  The skin over the nose is conforming to the new shape of the nose and this process manifests itself as swelling.  This fluctuation and swelling will eventually resolve as the skin accommodates itself to the new shape of the nose.