Pressure buildup in back of head when lying down feels like fluid. ct lp and mri supposedly clear. pressure and tingling also there when upright?

Think muscles!!!: You have a muscle issue in the neck and shoulders because they work together. Tightness in these muscles will pinch nerves and trigger all types of odd pain sensations. For chronic pain suffers a wellness program of vitamins and minerals (esp. Magnesium glycinate) sleep hygiene, exercise, self massage, yoga, heat, epsom tub soaking, stretching all are needed. I like acupuncture!