Does cauterizing underneath face after a facelift cause dents in the cheeks?

Thank you for your question. It is difficult to figure out what could be causing the contour irregularities you are describing without a physical exam or pictures. Often times, contour irregularities are due to fat, scar tissue, sutures, etc. Your surgeon should be able to give you more information. Hope that helps! 

There are a whole number if things that can cause dents in a facelift.  Using cautery is the least likely.  Insufficient undermining, liposuction of the cheeks, or fat injections are far more likely.  Almost all dents go away after a few months.  If any remain I think that completely redoing the side with the dent is far more likely to work than injecting fat.