The symptoms normally disappear after several days and there are no adverse health effects.
The cause of pine mouth has not been determined, but several researchers have indicated that a particular species and source of pine nut, Pinus armandii exported from the Shaanxi and Shanxi regions of China, may be responsible for causing the symptoms. This species of pine nut was previously only consumed locally and not widely exported for consumption as whole nuts.
I had this! It happened in maybe 2010 and there wasn't much information available online, but enough for me to figure that it was the pine nuts. It lasted for about five days and never happened again.
This happened to my wife a couple years ago, really freaked her out. She loves food, so it depressed her for almost two weeks to not get to enjoy anything