My whole life is watching for triggers now, triggers for Porphyria, which can be some drugs, some foods, and environmental toxins. Avoiding triggers is the only available help.
I hadn't thought that MS has triggers but now that I think of it, this was part of Swank's theory. He thought fatty foods triggered an autoimmune response which attacked myelin.
And I have never done well if I go off the Swank diet, except in one respect. I can eat more eggs than he recommended. But saturated fat is always a trigger for imbalance and eventual staggering. So I just avoid it.

I think our forest fire here this summer, which spread toxic fumes that lasted for months, triggered spasm and eventual seizure in my eyes. I was having blind episodes of several seconds, with painful spasm and what one medical person thought were seizures, where my eyes turned up. These episodes were brief and are gone now. Toxins are a big trigger for me, especially toxins in smoke.