Is it possible to reverse a subperiosteal midface lift?

Thanks for the question. You should be able to go on vacation by 3-4 weeks after your surgery. But this is valid only with assuming postoperative recovery is uneventful. If any unexpected incident happens in your treatment process, this time can be extended or shortened. I wish you all the best.

One would have to know exactly how it was performed, with what approach and sutures.  The soft tissues would have to be elevated in the subperiosteal plane and repositioned.  

A true reversal is truly impossible; revisional surgery is always an option. consult with an experienced facelift specialist to discuss your concerns after an in-person examination. The procedures will likely be different from the first surgery. Wait a full year before your second surgery.

This approach to facial rejuvenation is fraught with many potential problems. The only way to fix these problems is to totally disassemble the facelift in reestablish the proper relationships. This should be done by someone who is very familiar with the procedure. I would also encourage you to get a second opinion before proceeding.

Thank you for your question and for sharing your experience with us.  It is hard to answer without knowing the type of mid-face lift, if any tissue was removed as part of the procedure (hard to reverse) and what your specific concerns are. If there is a suture anchoring some tissue that can be reversed (or loosened) then this may be feasible.  I would also recommend that you revisit your surgeon and discuss your concerns as they would be in the best position to answer your question.