Let us consider a patient with type 1 diabetes.
I think it would be safe to say that diabetes is an autoimmune disease. Now let us suppose this patient comes under stress. As far as I know, cortisol is a stress hormone and is released when a human is under stress. Now cortisol, as far as I know, increases the amount of blood sugar and at the same time is an immunosuppressant.
I would like to know whether this stress-induced cortisol can suppress the immune system, which has gone haywire, and help against diabetes - thereby rendering a suitable amount of stress useful.