Doesn't sound like a problem. Moles often grow back after being shaved, sometimes with pigment and sometimes not. Facial moles are often flesh-colored. Shaving is a better idea on the nose than cutting, since cutting would leave an unacceptable scar in that area for a benign lesion. Let a skin doctor check it out to be sure, and to cauterize or shave it again if that seems appropriate and you want it done.
Take care.
Dr. Rockoff