That is a very plausible theory. Bravo!Perhaps anxiety only arises when this glutamate overstimulation specifically occurs in the amygdala, which is the main area of the brain responsible for mediating anxiety. If the glutamate overstimulation happens in other areas of the brain, then maybe different mental symptoms arise, but not anxiety.
This might explain why sinus inflammation is often linked to anxiety: the sinus cavities lie very close to the amygdala, so inflammation occurring in the sinuses might conceivably precipitate inflammation in the nearby amygdala, causing the amygdala's microglia to activate and pump out glutamate, leading to amygdala overstimulation, and anxiety.
I also wanted to add, that free-form gltuamates are in abundance in almost all processed food.
Russell Blaylock has a great presentation on it here:
Again, I will ask, what is causing Mast Cell activation?Microglia and mast cells: two tracks on the road to neuroinflammation
Brain mast cells link the immune system to anxiety-like behavior
Role of mast cell activation in inducing microglial cells to release neurotrophin
Mast cell tryptase induces microglia activation via protease-activated receptor 2 signaling
I think I am inclined to agree with Hip, that the cause is most likely all manner of pathogens. I would also add that using the Yasko multi-factorial approach, there are numerous environmental toxins and genetic defects creating a pre-existing overburden on the immune system. Once those underlying fundamentals are effectively dealt with the body can take care of the pathogens. The pathogens merely being the straw that broke the camels back.
That being said, what are some of the best ways to arm the body against pathogens? I picked myself up some NAG today, perhaps it will help buff my 1st line of defense against these insidious pathogens.