When I Rip Juul Right When It Goes To The

when i rip juul right when it goes to the back of my throat i feel like there is a bruise there and i have been juuling for a while now and this just started occuring a few days ago, it does not necissarly hurt but its a uncomfortable pain. I would feel better if I knew the cause of this. PLease get back to me as soon as possible. Juul is a vaping device by the way