Please, don't anyone take for granted that e-cigs are harmless
What nicotine is not, a carcinogen.
It is toxic, poisonous if ingested in high levels....40-60 mgs will kill you, your pets, your kids. That's about a teaspoonful of 24mg/ml juice, less than that if your nic density is higher. Please be careful about storing juice, and spills on your skin should be washed immediately. Do not expose your children to it, even on just your fingers. Or let your pet lick your skin after contact with the juice. WASH it off. It will absorb through your skin. It kills bugs!
Nicotine is highly addictive: it is rightly unknown if the substance itself is addictive OR if it is added to any other substance makes that the addiction. This is a question long been posed by cigarette smokers, is it the nicotine or is it other things in the cigarette we are addicted to. Either way, the nicotine-laden neuron receptors in your brain will make you feel euphoric when nicotine is in the blood system. Overdosing will make you feel giddy, or increased heart rate, sluggish, "out-of-focus", stomach cramps or nausea....stop ingesting immediately, symptoms will subside unless other physical conditions intensify danger. Cut down the level you have been using.
Nicotine is known to raise blood pressure levels, by constricting blood vessels. Smokers always have known the red blotches on a smoker's face are capillaries under the skins' surface that become occluded, blood does not flow easily through the tiny things, clotting can take place, making it look like your nose is red or purple, under-eye black circles, and across the cheeks and general "ruddy" looking skin. My "mask" is nearly gone!, but I always looked tired because of bloated stagnated circulation in my skin. But do watch your blood pressure, especially if you are pre-disposed to high BP, heart problems, lung problems, poor circulation (diabetes) PAD, COPD,etc.. This is not a joke, e-cigs are from 100 - 1000 times safer than cigarettes, but don't fool yourself into being complacent about the nicotine. And make sure others know it as well. Ignorance about this is surely not blissful.
Disclaimer:This information is from my research, so please take that into account.