Answer by  
                                                                                          JB45 (30)
                                                            
                          
                          
                                                           One of the things that can cause white gums after dental surgery is the use of lidocaine with epinephrine to numb the surgical site. This is used as the "epi" causes vasodilation and reduces the blood flow to the area, so the doctor can "see" where he's numbed.