I found some useful articles on NDPH and chronic headache that may be of interest to you if you suffer from new daily persistent headache or have frequent headaches.
There are also some key take-home points even if you do not currently suffer from any headache condition.
The first point is that surgery has been shown to trigger 24/7 headache in children in at least a handful of cases. This has occurred in extra-cranial surgery, meaning surgery that is not of the brain.
The pathophysiology of this is currently unknown… Thus this should certainly be weighed when considering whether or not to undergo wisdom teeth removal as it is surgery.
The other important take-home point is that this 24/7 headache often does not respond to any treatment. Thus the goal of treatment in the short term is often to reduce the intensity of the headache.
I have uploaded the headache articles to my website. You can view the first at
http://www.teethremoval.com/What_Incites_New_Daily_Persistent_Headache_in_Children.pdf
The second article is at
http://www.teethremoval.com/New_Daily_Persistent_Headache_in_Children_and_Adults.pdf