If you've ever taken a puff of your vape and felt your throat burn, started coughing uncontrollably, or noticed your mouth feeling dry and irritated, it might not be the nicotine or the coil. It could be the propylene glycol (PG) in your e-liquid.
For many vapers, PG isn’t a problem. But for others, it can trigger uncomfortable or even allergic reactions. Whether you’re new to vaping or looking for answers to unexplained irritation, this guide breaks down what a PG allergy or sensitivity looks like.
WHAT IS PG (PROPYLENE GLYCOL)?
PG is a clear, odorless liquid commonly used in vape juices. It helps carry flavor and gives that familiar “throat hit” sensation that mimics smoking. It’s also found in everyday items like:
oToothpaste
oDeodorants
oSkincare products
oProcessed foods
oPharmaceuticals
PG is approved for ingestion and topical use, but inhalation can be a different story, especially for sensitive individuals.
PG SENSITIVITY VS. PG ALLERGY: WHAT’S THE DIFFERENCE?
It’s important to distinguish between a sensitivity and a true allergic reaction.
oPG Sensitivity: The most common response. Symptoms are usually mild to moderate and include:
oSore or dry throat
oCoughing
oChest tightness
oDehydration
oHeadaches
oPG Allergy (rare): A more intense immune response, which can involve:
oHives or a skin rash
oSwelling of the lips or tongue
oItchy or watery eyes
oBreathing difficulties
If your symptoms are more severe or don’t go away after switching products, you should always seek medical advice.
SIGNS YOU MIGHT HAVE A PG ALLERGY OR SENSITIVITY
If you’re vaping a PG-heavy e-liquid and notice symptoms soon after, here are some red flags to look out for:
oPersistent dry mouth or sore throat, even with adequate hydration
oCoughing fits that don’t seem tied to nicotine strength or device power
oSkin irritation, especially around the mouth or lips
oWheezing or chest discomfort after vaping
PG reactions tend to show up quickly, sometimes even within the first few minutes of vaping. If you find yourself constantly switching e-liquids or devices, trying to “fix” the issue, PG may be the root cause.
WHAT TO DO IF YOU SUSPECT A PG ALLERGY
The first step? Stop using e-liquids with PG.
Check your vape juice label—most commercial blends contain 50% or more PG. Even those labeled “max VG” may still contain traces.
Instead, opt for 100% VG-based e-liquids. This switch alone clears up symptoms for many vapers. If symptoms persist after switching, or if you’ve experienced more serious reactions (like hives or breathing issues), talk to a doctor or allergist for proper testing and treatment.
SWITCHING TO VG-ONLY E-LIQUIDS:
That means:
oNo propylene glycol
oNo artificial sweeteners
oNo added coloring
VG (vegetable glycerin) is naturally derived and produces dense vapor, a smooth inhale, and a touch of natural sweetness. For those with PG sensitivity or just looking for a cleaner, more comfortable vape, VG-only juice is a game-changer.
Pro tip: VG is thicker than PG, so it works best with coils designed for high-VG or sub-ohm vaping. If you’re switching over, make sure your device is compatible or adjust your wicking setup to avoid dry hits.
FAQS ABOUT PG-FREE VAPING
Q: WILL I STILL GET A SATISFYING THROAT HIT WITH VG-ONLY JUICE?
A: VG provides a smoother, softer inhale. If you’re used to PG’s sharp throat hit, it may feel gentler, but many people find it more enjoyable, especially with higher nicotine strengths.
Q: CAN I USE VG JUICE IN MY CURRENT VAPE?
A: Most modern tanks and pod systems are compatible with VG juice. However, you may want to use lower resistance coils and ensure proper wicking to handle the thicker liquid.
Q: DOES VG AFFECT FLAVOR OR CLOUD PRODUCTION?
A: VG enhances cloud production and offers a naturally sweet base that blends beautifully with Velvet Cloud’s layered, dessert-inspired flavors. While it may slightly mute sharp citrus or menthols, our flavor profiles are designed to shine in a VG-only blend.
CONCLUSION
PG sensitivity and allergies are more common than you might think, but they don’t have to ruin your vaping experience. If you’ve been dealing with a sore throat, coughing, or skin irritation and can’t figure out why, PG might be the culprit.
Vaping shouldn’t hurt. And with the right juice, it won’t.