my dad is 81 yrs old. had 5 strokes, needs a 5 by pass but not candidate. has hardening of arteries, prostate cancer, mini strokes, dementia, and blood clots. He said he has been dreaming about dead relatives and sometimes sees him self standing upright and in no pain. He has started to get red flushing of the face , very hot, and sweating, and stomach pain. What is happening?