The cause of PCS is unknown, It is speculated that it could be caused by the pinching of a nerve. There is also a correlation of PCS to stress and anxiety. PCS is often seen to occur during rest or a sudden change in posture, but never during sleep.
I usually get this sharp pain in my chest just above my heart. It usually happen when I'm really stressed and yelling at the kids. Sometimes it is so bad That I just have to sit down for fear of falling down. I've even considered calling 911 on a couple of occasions. I am due for a check up soon, so I intend ti discuss it with by doctor.