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Understanding PG Allergy Symptoms - The Signs and What to Do
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Understanding PG Allergy Symptoms – The Signs and What To Do

If you’re new to vaping and having problems, you may be wondering if you have an allergy or sensitivity to one of the ingredients in your eliquid. While possible, allergies to vegetable glycerin and propylene glycol are actually quite uncommon, and there could be another potential cause for your discomfort.

The signs of quitting smoking can be very similar to those of a PG sensitivity, so if you’re experiencing headaches, nausea, and coughing up phlegm, it could be your body clearing out the toxins from tobacco smoke rather than PG allergy symptoms. It’s also possible that your nicotine concentration in your eliquid is too high, or that you aren’t vaporizing your juice properly.

So to help you figure out if you’re really experiencing PG allergy symptoms, we’ll discuss what a PG allergy is, what the signs and symptoms are, and what to do about them.

What is Propylene Glycol?

PG or propylene glycol is colorless, odorless, and almost tasteless and is one of the main ingredients used in eliquids. Along with VG, PG is generally recognized as safe for consumption by the United States Food and Drug Administration and is non toxic, and thus widely used in many household products and foods.

Generally, if you had a severe allergy to propylene glycol, you would know it far before you ever used an e liquid containing it.

Why is PG Used in Eliquids?

PG is very useful when it comes to making eliquids, and this is for a number of reasons. Firstly, PG is great at carrying and suspending flavors in your eliquids, much better than VG. Secondly, PG provides the ‘throat hit’ that a lot of ex-smokers and vapers crave. Because of these two hallmark qualities of PG, it sees wide use in most eliquids at concentrations of 50% and above.

PG Sensitivity or just the ‘Smokers Flu’?PG Sensitivity or Smokers Flu?

As mentioned earlier, VG and PG allergies/sensitivity are actually quite uncommon and thus it’s possible that your discomfort arises from elsewhere. Only around 1 in 1000 people are sensitive to VG, while around 1 in 10 will experience slight sensitivity in the form of a dry throat from PG.

Thus, it’s possible that you are experiencing the signs of quitting smoking if your experience sounds similar to the following:

  • Headache
  • Nausea
  • Coughing up phlegm
  • Sore throat and sneezing
  • Constipation, diarrhoea, stomach aches
  • Dizziness or feeling light-headed
  • Mouth ulcers

If that sounds like you, it’s probably just your body detoxifying and ridding itself of the chemicals present from tobacco smoke.

You could also be experiencing the signs of a nicotine strength that is too high for you to handle. If your throat is hurting and you’re using a high concentration nicotine e liquid, try using a lower nicotine strength of the same ejuice and see if there’s any difference. This is one of the most common problems that is mistaken for a PG allergy.

Because PG and VG attract moisture, vaping will dehydrate you and this can also lead to dry mouth and a sore throat if you aren’t hydrating properly. Make sure to drink plenty of water.

PG Allergy SymptomsPG Allergy Symptoms

Now, while similar to the above problems, the signs of a pg sensitivity can be discerned right away if you know what to look for:

Dry Throat

1 in 10 new vapers are slightly sensitive to propylene glycol and will suffer from upper respiratory tract irritation and/or drying. This may not be a severe effect, and most will experience the symptoms gradually going away as they become tolerant.  

Sore Throat

About 1 in 100 people are very sensitive to PG and will experience and very painful sore throat when using high PG eliquids.

Swollen Gums

If you’re experiencing swollen, painful gums while vaping a high PG ejuice, you may have a PG allergy.

Rashes and Skin Problems

1 in 5,000 people are highly sensitive and allergic to PG and will experience skin problems that can range from dryness to extreme and severe itching, as well as rashes and hives. If you start to experience rashes on your face, lips and neck you should stop vaping PG immediately and see your doctor. 

Sinus Problems

If you’re experiencing sinus problems and discomfort while vaping on a high PG eliquid, this is a common sign of a PG sensitivity. Watch for a burning or tingling sensation in the nose/sinuses that persists as you vape.

What to do If You Have a PG Allergy or Sensitivity

If you have a PG allergy, no need to fret! You can still enjoy the benefits of vaping over smoking, but will have to make some adjustments. To start, you’ll definitely want to find yourself a juice without PG. Luckily, there are some great pure VG ejuices out there for you to try that are amazing! VG is thicker than PG, and has a naturally sweet taste that blends in well with ejuice flavors. is a great, reputable source to buy 100% VG ejuices and you’ll find a wide selection of the most popular brands. These juices are completely PG free, and will therefore be suitable to anyone with a PG sensitivity or allergy.

Similarly, Kind Juice carry a PG-free line of eliquids called Nectars because of their use of only natural wild crafted botanical extracts, and organic flavor concentrates. For those with a PG allergy or who are extremely conscious of what they vape, the Nectars from Kind Juice are extremely tasty and still provide a satisfying throat hit!

Just because you’re sensitive to PG doesn’t mean you can’t still vape! See your doctor if you believe you have a PG allergy or sensitivity for the best treatment and results.

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  • hi i have been vaping for 5 years doing my own e liquid at home for past two years. problem now is am getting sores in my mouth ,

    • Hey Billy,

      Are you drinking enough water? I’ve had this issue when I was vaping too much and not staying hydrated. But honestly, I would go see your family doctor because perhaps you’re allergic to PG.

    • Always make sure you keep your vape clean as well. I got ulcers all the time. And then I kept the vape clean and changed tips regularly and bought a cap for the top of the tip.

      Been three months now not a single ulcer

  • Hi I quit smoking nearly 3 weeks ago and started vaping but for nearly a week now I’ve had like ulcers on the roof of my mouth and raised taste buds, just wondering if this is normal after you quit smoking? Any help would be great I currently vape 70vg 30pg.

    • Hello Gareth,

      I would definitely see your doctor about this but it could be that you’re not staying hydrated enough. Make sure you drink a lot of water and see if this helps.

  • I’m vaping naked Hawaiian pog 3mg gas 65vg/35pg I’m having scraty throat an my chest feels burny an kinda hurts any idea it feels something stuck in my throat

  • I’ve been vaping for 3 months. I have since developed serious skin inflammation in and behind my ears, scalp, sides of nose, armpit and groin. Do you think PG could be the culprit? Thanks.

    • Hello Damian,

      I don’t think this would be a PG allergy as it would likely only affect areas of the skin where you’ve had contact with PG, but I’m not a doctor so I can’t say for sure. I highly suggest going to see your family doctor ASAP.

    • Yes, I have a PG allergy too .. because you are inhaling the PG, you will get a rash almost anywhere as its in your blood stream, I get rashes on my throat, scalp, eyelids, feet legs arms and torso .. antihistamines can help depending on how allergic .. you can also build a tolerance over time, again depending on how allergic, hope this helps

  • I’m curious, I got a vape, and some 10mg salt nic juice (from what I understand it’s a 50-50) when I first started I got a few ulcers but those went away, then I think I was good for a while (about 3-4 weeks) thrn this morning I woke with a pretty sore/dry feeling throat.. drank water coughed a bit and then am able to vape again with no real discomfort I can tell… I’m wondering if that was from vaping to much before bed or if I’m developing a PG sensitivity and how does one find out if they’re sensitive to PG? Is there a test like putting a drop of juice on your skin and see if there’s a reaction?

    • Hi Dylan. The only sure way to know if you’re developing sensitivity to PG would be to make an appointment with your family doctor and have them run some tests.

      This isn’t medical advice, but it sounds like maybe you’re onto something with vaping too much before bed. You have to drink plenty of water when you’re vaping because vaping draws water from your mouth, nasal cavity and throat, drying them out. Make sure to drink plenty of water while vaping and see your family doctor if you’re concerned about a PG allergy/sensitivity!

  • Hi, I quit smoking cigarettes 7 months ago. I started camping the Geek bar, I started having problems with my stomach and esophagus. Now I have inflammation of the esophagus in the stomach lining from vaping. I have real bad rashes all over my skin. I have decided to quit .I don’t know how long it’s going to take me but these rashes and stomach and esophagus problem is going to send me downhill fast if I don’t hurry up and quit.