The response to spicy food is not all psychological. It's due to activation of heat receptors by capsaicin. Note: many factors affect the subjective experience of taste sensation.
I have been put into atrial fibrillation by the aggravation caused by spicy food from a popular indian restaurant in north Seattle. I had to get cardioverted. Was it due to stress? Was it due to the sustained rise in blood pressure? Was it caused by GI? It doesn't matter. I have to avoid it now, for safety.
I, too, have dined at Taste Of India, and paid the price. I'll do it again too!