Could be a weird bodily thing, or it could be an early way of sensing energy. Nobody here can figure that out except you.
Advance on the path with the standard beginner meditations and see how this develops over time, how feeling energy in meditation will be and if there are any similarities, etc.
Do that for a few months, journal your experiences, come back here with testimonials and you will be blessed in sharing the testimonial through others being encouraged to meditate and through adding value to the community.
That would be the best way to handle this.