What can be done to correct indent under cheek after facelift? It looks hollow. (Photo)

Contour problems, small up's and down's may occur after a face lift and are usually temporary. Since you are 4 months post-op,  the indented area may be conservatively  treated with a inject-able filler. Speak to your surgeon about this issue because he/she has seen this before.

Thank you for your question.  It is difficult to evaluate the degree of hollowing from the photos, but the most likely solution will involve either temporary fillers such as Radiesse or Voluma, or permanent autologous fat transfer.  See your surgeon who can evaluate you in person and give you a informed recommendation.

A contour abnormality shown in the picture is not expected after a facelift. Was your buccal fat pad excised? The quickest solution is probably placement of filler.