I was born with a weak, almost nonexistent philtrum columns. Can they be created or enhanced with filler?

Excellent question.  I am sorry to hear that you are bothered by the shape of your mouth.   Philtral columns can indeed be enhanced and defined with the aid of precisely placed injectable fillers.  The type of filler and technique really depends on your anatomy.  The good news is that there are a number of products which can help augment and define the cupids bow and philtral columns.  Please see a board certified dermatologist who specializes in injectable fillers.  I hope this helps!

Yes, fillers can be very effective in recreating flattened philtral columns.  A firm filler should be selected so that it maintains its shape.