Is there a limit to undergoing PDO treatment?

Thank you for your question. A thread lift is a minimally invasive procedure that is able to target the deeper layers of skin on a patient’s face and neck. The procedure uses absorbable sutures that lift and tighten the skin and stimulate collagen as they dissolve over time. Results will continue to improve for up to several months after surgery. This should not affect your treatments in the future. I recommend getting a in person consultation with a board-certified dermatologist.

Dear Hilary,
Thank you for your question. 
What is a ThreadLift?
A ThreadLift is a minimally invasive, non-surgical procedureProviding a firmer, fresher, rejuvenated, natural look similar to a facelift
What exactly are Threads?
Threads are absorbable barbed sutures comprised of a SUTURE material (PDO, PLLA).These barbs grab onto the sagging tissues beneath the skin, lifting and supporting them.
What can be treated with a ThreadLift?
Threadlifts can be used to lift or balance out sagging or asymmetric eyebrows,Lift sagging cheeks and laugh linesLift mid and lower face, jawline and neck soft tissue, and to smooth aging skin.
There are several forms of PDO threads. These all serve to lift and reposition saggy skin. The science behind is that PDO Threads stimulate collagen growth. 
When performed correctly, neocollagenesis serves to firm and tighten your face, hence producing a slimmer contour. Future treatments will not necessarily be more difficult so this is untrue. 
I hope you find this helpful.