I have feeling of blood running into my head when sleeping and when i increase pillow height i feel comfortable. i have spondilitis is that the reason?

Maybe heart problem: Sounds like maybe raising the head helps blood drain, which might imply a kind of poor flow into or thru the heart. Do neck veins get big (jvd ) without the pillows? Spondylitis is too general a term -is this referring to arthritis in the c-spine? If so I can't see how this would be directly related. Please provide more specific and descriptive detail about symptoms and other existing problems.