I don't believe there are known health reasons not to use an e-cigarette. It's a relatively new phenomenon though and hasn't been around long enough for us to s

I don't believe there are known health reasons not to use an e-cigarette. It's a relatively new phenomenon though and hasn't been around long enough for us to study all possible long term effects. There are, however, plenty of social reasons, depending on the local culture. Not everybody necessarily realises that e-cigarettes are harmless to them and get upset when you use one around them, for example. Or people have had unpleasant experiences with aggressive e-cigarette consumers using them in public places like a restaurant or a train and getting uppity when asked to stop. Another social stigma is that e-cigarette users tend to wax lyrical about them and, and I say that as an ex-user, not be very pleasant conversationalists, at least in the first few weeks after the discovery. I have seen people in social occasions actively avoid e-cigarette users (me!) for fear of being dragged into yet another lecture about vaping.