The burning that you feel is inflammation from adrenaline. I feel heat radiating from my head into my ears as well from the inflammation. I always told my doctor that I felt like my brain was on fire. And he said, "well it kind of is." Adrenaline is also what is causing your cramping burning diarrhea. I know it sounds simple but it is actually quite complex. I get it too. It is all your brain signaling out of whack and putting you in a constant state of stress, even if you don't feel like you are stressed. But undiagnosed illness can cause plenty of stress for sure. Think about it, if your brain thinks it is being chased by a tiger all the time then you are literally going to poop your pants, as digestion is not a priority. Sorry for the analogy.
You feel intoxicated when you wake up because their is too much inflammation at night time. Our brain increases inflammation at night time to put us to sleep. It is similar to when you have the flu. You feel like sleeping all the time, because you are inflamed. It is a similar mechanism to put you to sleep but not on that level. But when your brain already has too much inflammation then it tends to drag on into the morning making you feel out of it. That is also what causes the fatigue aspect of adrenal fatigue. Inflammation. Also the twitching and jolting that you get is also adrenaline. I get that too.
anyways just some more tid bits that I have picked up. hope it helps in some way.