Hullo! \n\nI'm new here, and I made an account specifically so I could ask this, but...\n\nThis phenomenon happens to me EVERY time I get a filling. I go in, get the initial numbing shots, and then I get laughing gas. It's a grand ole time. I can't feel a thing, you know, and I'm just there hanging out in the chair waiting for my dentist to start working on me, and then the drilling starts. When my dentist starts drilling my tooth (or it's a filling replacement, my body does not discriminate, it seems.), my world disappears. It's like my brain shuts off and my body goes numb and I get REALLY tired, and to be frank I generally think, "Am I dying?" which is usually followed by an "I don't care" which is a little alarming but I'm just so relaxed that I genuinely don't. I freaked my dentist and the attendants out one day asking them why I felt like that (They didn't give me an answer, either.), so, my question is, why do I just want to sleep forever and go numb when my dentist starts drilling on me? Note it's not while I'm on gas or numb, which I am of course, but this only specifically happens when she starts drilling, and goes away soon after. \n\nIs it vertigo? Am I in shock? I know I take a bit more numbing shot stuff (forgot the name) than most people and my nurses tend to give extra laughing gas, too, but I'm not sure if that matters or not. However I think that would eliminate shock. I've just always wondered why it happens. \n\nDon't get me wrong, the feeling is GREAT, I've never taken drugs before but it's how I would imagine a mega load of morphine to feel. It's concerning, though, as I assume you'd imagine. So, I just want to know what it is, why does it happen, and if it's bad or a condition of something else, or something.