I concur that it's not an end in itself, but certainly not a bad sign. This is, I assume, the sort of "vibrations" that Daniel talks about. I don't know if it's a heightened awareness of what's already there, which we typically ignore, or something new brought about by meditation. Either way, I definitely think it's a signpost along the way. The first time I experienced the first jhana, which included a tingling sensation like the one you describe, I wondered if I'd come very close to it several years prior via relaxation that created a similar sensation.
So, yeah, why not play around with it? Push into it and let it "burst" to see what happens.

When I did that, I had my first jhanic (or A&P, not sure) experience.