It is normal to hear a heartbeat on a pillow.
Hearing your heartbeat on your pillow is normal and not unusual, especially when you're in a quiet environment.
Although if you hear bothersome sounds or persistent sounds you should discuss it with your doctor.
The bothersome sounds or persistent sounds of a heartbeat on your pillow is a phenomenon that is often called pulsatile tinnitus and can be linked to stress, blood pressure or other underlying conditions.
In most cases though it's perfectly normal and okay to hear your heartbeat on a pillow.
When you lay still, such as in a quiet room, like your bedroom, your heartbeat can become more noticeable, and is often a result of the absence of the other ambient sounds which would normally mask the sound of your heartbeat.
If your blood pressure is elevated, you may also be more aware of the sound of your heartbeat.
Even stress and anxiety and adrenaline can make your heartbeat seem louder.
Pulsatile tinnitus can be associated with issues like high blood pressure, blood vessel abnormalities and other health issues.
If you experience any changes in your hearing like muffled sounds or a feeling of fullness in your ear, it's important to see your doctor.
Continue to monitor the sound of your heartbeat that you hear on a pillow and if it changes with different activities or positions you may need to consult with a doctor just to be safe.
If the sound of the heartbeat is persistent or is bothersome or is accompanied by any other symptoms you should consult with your doctor just to be sure it's nothing else going on.