Ask the experts
When I lie down at night with my head on my pillow I can hear my heart beating loudly in my ears. It is often so loud that I cannot get to sleep. I have borderline high blood pressure, could that be it?
It is very common to sense your heart beat while lying in bed - rarely is it anything serious, but certainly this sensation will be aggravated if your blood pressure is high. If your blood pressure is normal, it most likely is not a cause of concern. It may also be intensified by any heightened "catecholamine" release (for example, adrenaline) state, such as caffeine consumption, anxiety, fear, etc.
Medically reviewed by John A. Daller, MD; American Board of Surgery with subspecialty certification in surgical critical care
"Overview of hypertension in adults"