Hi,
If you take SSRI's these can make you yawn
Regards
Tracey
I have not read anything on spontaneous yawning, I think of it as a voluntary thing, albeit sometimes I feel like I need to yawn.
I have read somewhere that yawning can be stimulated by a need for oxygen. Try deep breathing for a few breaths to see if that makes the yawning urge subside.
Could it be related to your heart? Possible, but no direct connection that I know of. Do you have a regular and "normal" heart beat? Example, a rest HR in the range 60-80 beats per minute, and regular in rate and intensity is what I have in mind for "regular". If not there maybe a relationship to the need to yawn, you should consider discussing with you primary care doctor.