I'm hoping someone can help here because it makes no sense to me! I managed to quit smoking 2 years ago (after 30 odd years) using ecigs (doubt if I would have succeeded without). All's been brilliant until about 4 weeks ago when I started coughing very violently each time I inhail on my ecig. I do not however cough when I'm not using my ecig . I've tried changing my juice to 100% vg but that didn't work. It's really quite scary as it happened so suddenly has anyone got any idea what could be causing this?