Do thread lifts really address the jowls and neck?

Yes, the PDO Thread Lift such as Novathreads is a wonderful way to lift the jowls and tighten the skin in that area.  There is immediate repositioning of the facial tissue so that it is lifted up and back.  Afterwards, the skin will get even smoother, tighter and the lower third of the face gets smaller as collagen is stimulated by the threads.  This promotes the remodeling of the lower third of the face into more of a V shape from the square shape that occurs with aging and jowls.  I would recommend a consultation to be sure that it would help you but if you are a candidate it can make a significant difference in creating a sharper jaw line. 
If the procedure is done well, there is no "bunching up".  If there is any irregularities after the procedure, they either resolve spontaneously or can be addressed with a minor procedure or radiofrequency treatments.

Thank you for asking the question.
The lifting effect of threads depends on the type of threads. The PDO Threads generally do not work to well on the jowls and neck and generally the lifting effect is very minimal The Cog-threads and other non dissolvable threads have a far better result because they are able to engage the skin and cause an actual lift which is visible right there. Therefore it is better that you can consult some Plastic Surgeon or an Aesthetic Dermatologist in your area to better understand the solution.

Regards, Dr. Amit Gupta