How stomach and liver function effects brain function.. i feel sluggish, feeling like brain is going to blast,brain nerves are working in very hight pressure. this happens regularly after few days of gap what i feel is there is no problem in my brain but its root cause is somewhere in stomach and liver.. i don't know whom to visit neurologist or gastroenterologist . i want to rule out all possible causes due to stomach or liver then only i ll go to neurologist. what's the problem???