What can cause severe fatique. severe, almost no energy. Sleep all night. Get up for 15 minutes, go back to bed and sleep for 2 hours and get up for 30 minutes. Go back to bed and sleep for another 3 hours. Up for another 30 minutes etc. etc. Sleep all night and repeat this for days in a row. Occasionally I can have a spell of 5 or so days in a row where I will feel like a fairly normally 68 year old. Then its back into Rip Van Winkle Land. I have an amune difisicience disise, psisorises. (my spelling is terrible). I have had problems for several years of one sort or another but some of these symptoms are getting much worse. I have to believe they point to something. They are so unusual. It can t just be old age.