A flat mole cannot be shaved off, so it would need to be excised. A small cut would need to be made around the mole to remove it and then sutures used to put the skin back together.
What is the Best Treatment Option to Remove a Flat Mole?
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What is best method to remove a flat mole?
Treatment options for removing a flat mole
Depending on their size and location, most moles can be easily removed by one of two methods. One is a "shave excision" where the mole is actually "shaved off" at a level just below the surface of the skin. The other is an excision with suture closure which uses both dissolving and non-dissolving sutures to give the best cosmetic result. All methods of surgery will leave a scar but the trick is to minimize the scar using the proper technique.