I see now where you are coming from. And we have misunderstood what the other was saying. When refering to causes, I wasn't referring to allergic triggers like pollen, dust, food etc... I was refering to differnt bodily chemical reactions.
For example, when histimine is released in the body, cortisol is released to reduce the inflammation. However the reverse is also true. When the body is under stress, the body also releases cortisol, and when too much cortisol is circulating in the body, histimine is released to "use it up" so to speak. You can see how this could start a vicious cycle of inflammation and possibly adrenal fatigue. This is just one of many examples, and there are actually 2 types of histimine in the body.
I agree that avoidance of triggers provides just short term relief. Though it is an invaluable place to start. Symptom relief gives me enough energy to function daily, and work toward better health.