If you experience any negative reaction to the use of e-Liquids then cease using that liquid immediately. There are three ingredients in e-Liquid that may cause a reaction in a very small number of people. The vast majority of people will experience no allergic issue with e-Liquid.
What reactions can people have to e-Liquid?
Allergic reactions to e-Liquid are typically mild.
Propylene glycol is always the first ingredient people blame for a reaction to e-Liquid. The truth is it is VERY unlikely you are allergic to propylene glycol. Also, given the prolific use of propylene glycol in medication and food, it is unlikely you would be unaware that you had such an allergy. That propylene glycol has a chemical sounding name is the more likely reason for its unfairly being blamed first.
That said there are a VERY small number of people who are genuinely allergic to propylene glycol. Switching to a high vegetable glycerine blend may help.
The nicotine used in e-Liquid is in a different form to that found in …