Slit for Belly Button?

At this point you are still early in your recovery from tummy tuck surgery. If you are ok with the belly button appearance then you don't need additional surgery to correct it. The only thing with a very small belly button is that it's difficult to clean. If you are bother by it at all, then consider a revision which is typically performed in office setting under local anesthesia. I usually will perform it after 6 to 9 months from the initial surgery.

 At first, the belly button may appear to be small and when the swelling around the belly button goes away it will appear to be the proper size it was designed to be.  This is the most common reason that the belly button appears too small immediately after surgery.  It may take 6 months to see the final result.  You should speak to your plastic surgeon about this.