Hello, when I lower my head, such that blood flows towards it, I always hear and feel a sensation at the side of my head, above and around the ear. It feels and sounds as if the veins are clogged and increasing the pressure unclogs it. Near my school exams few months back, I felt an ache at the left side, and my school doctor said it was due to stress. I am wondering if the clogged vein sensation is a symptom of high cholesterol or something else?