I have noticed that cortisol is mentioned in more and more articles lately. Just this week study results were published in the European Heart Journal which found a link between stress and heart attacks/strokes (We have known this intuitively for years, haven't we? Here is proof!). Cortisol levels seem to have a key role.
I find I have a new interest in cortisol after reading the Mayo Clinic article "Stress: Win control over the stress in your life" which says of cortisol: "the primary stress hormone, increases sugars (glucose) in the bloodstream,...It alters immune system responses and suppresses the digestive system, the reproductive system and growth processes."
Since I have been unable to reduce my insulin level by diet alone, I am now looking at all sources of glucose (insulin is generously secreted in respone to the glucose level), including cortisol. I have not had my cortisol level tested, but suspect it may be the source of my blood glucose.
Perhaps this can explain the observation that stress worsens MS symptoms.