I have had excessive sweating all over my body mainly head and overheating which cause me to have symptoms like a migraine head ache. Absolute nausea at times vomiting blurred vision and tunnel vision and blind spots and zigzags. The overheating  at time feels like it is going to be too much to bear. I have been to so many doctors and researched this so much. Nobody can help me. As the hypothalmus controls body temperature and the pituarity gland  could there be something wrong with that part of mh brain and if so what can I do aboutit.