Table 1:

Top keywords in each health category

Health Category	Symptom Keyword	# of Posts	Example Post
Respiratory	Lung	1766	“During the weekend I pretty much have it next to me all day and drain about a pod a day…I have a wicked headache and my lungs are aching.”
	Cough	630	“From the JUUL? None, or at least none that I can distinguish from the damage I did smoking. My smokers cough is almost non-existent, and my lung capacity seems to be getting better.”
	Popcorn Lung	154	“She basically told us that JUULs are full of a shitton of nicotine and also the flavoring can possibly give you [popcorn lung] a delightful disease named after the popcorn factory workers who first got it from inhaling the flavoring put on microwave popcorn.”
Throat	Throat Hit	1557	“It’s far from a vaping experience, it is much more similar to a smoking experience though, strong throat hit and very strong nic hit.”
	Throat	770	“It definitely outperforms any cigalike i’ve encountered, but it is quite harsh. Even holding for 3+ seconds on a mouth to lung hit left my throat burning on inhale.”
Neurological	Headache	137	“…I’ve never experienced this myself but it usually kills it for me from the headache I get from chain vaping the JUUL.”
	Sensitive	113	“Sometimes people have sensitivity to higher pg levels…the ejuice made me want to vomit. I believe that it was due to the high pg level…I also used to vape on one of those JUUL sticks.”
	Dizzy	89	“The JUUL already has me hypersalivating feeling dizzy unless I control myself and put it down.”
Psychological	Anxiety	405	“Nicotine, especially the JUUL, can at times amplify my anxiety so I would not recommend using the JUUL…”
	Stress	288	“…The juul has helped me with stress…”
	Depression	197	“I have anxiety depression and I wish I never started smoking cigs. The JUUL helped me cut down a lot on cigs and helped eliminate most of the bleh feeling they give…Having a little escape is nice and the JUUL is a much better vice than many on the market, especially if your psych leans on the benzo side for relaxation.”
Cardiovascular	Heart	254	“Things like JUUL literally contain ingredients like nicotine, which have been proven to increase the risk of heart disease and possibly [lung] cancer.”
	Blood Pressure	66	“Yeah after hitting my JUUL alot I figured out the reason what was causing my breathing issues was the 50 nic was raising my blood pressure and making it harder for me to breathe…”
Digestive	Stomach	158	“Have you ever smoked a juul? Cigarettes don’t give me stomach aches but a JUUL wrecks me every time.”
	Vomit	156	“The JUUL mint has been making me nauseous to the point of actually vomiting lately. Other flavors are fine though.”
Mouth	Teeth	183	“I switched to the JUUL a year or so ago…my teeth are very white and have very nice gums according to my dentist 1 month ago, I can’t remember the last time I heard that, if ever.
	Lips	108	“JUUL’s just not a sustainable pod/device ecosystem for myself. high nic + spit back = numb lips/sucks.”
	Tongue	99	“Not a sore throat, sore tongue. I never had this problem before until I started using a JUUL when I decided to stop smoking cigarettes three months ago.”
Cancer	Cancer	642	“You could make an argument that the JUUL is safer as you need less vapor to fullfil your nic craving…if your worried about cancer vaping is way down on the list of things that can contribute to you getting cancer.”
	Lung Cancer	172	“I’ve gotten at least 12 chain texts from people with mutual friends that now have lung cancer from only juuling....I am definitely freaking out and have thrown my juul away cause I can’t shake it. However, it seems odd that this happened to these individuals after only a few months of juuling…”
Other	Hurt	499	“…You can’t taste anything, it has that spicy nic taste that makes my chest hurt.”
	Skin	317	“I impulsively purchased a new JUUL, almost immediately I noticed my skin felt tight and irritated. Overnight new small, flat red spots appeared--they hurt and feel as if they have their own pulse at times though they were not yet pimples.”
	Nausea	184	“The classic menthol has a strange aftertaste…after about 3–4 pulls I started getting a headache and started getting nauseous. I swapped in a mint pod and felt fine. Couple of hours later I tried a couple of pulls from the classic menthol pod and started getting the same headache and nausea.”