US Vaping Illness: What We Know So Far Fears vaping could cause Cancer Healthwatch Barnsley Why Do I Feel Sick After Vaping? Here's What You NEED to Know! Why Do I Feel Sick After Vaping? Here's What You NEED to Know! Does Vape Juice Expire? How Long Will It Last? Sometimes when people vape for the first time they can feel quite unwell and, in some cases, they can actually be sick. This is due to the nicotine they're ingesting and is