Well, it&#x27;s not. It&#x27;s using pressure differentials to cause small capillaries to burst(?), causing minimal damage as possible.<p>I can see why Google might be interested in doing this. They&#x27;re already in the smart watch market, it&#x27;s only a short leap into the world of medical devices if they invent a way to continuously monitor blood sugar levels (among other metrics) for the user.