I have a hiatel hernia and IBS. When I lay down( after working out or running) to go to bed I feel these rushes build up like blood backed up then released. Any ideas on what is going on? I call them spells. When I get up I don't have them anymore. I can't go to sleep because these spells will cycle for unknown amounts of time. Sometimes the spell would be one rush, other times it could be many. Don't know if it's hernia related, ibs or a heart condition. Have seen local doctors and have had CT scans, x-rays, colonoscopy, upper endoscopy. No one seems to be able to figure anything out because I appear healthy on all the tests. Those previous tests are what determined I had a hiatel hernia.