Can Vaping Cause Mouth Ulcers?
Why some vapers develop mouth ulcers and what you can do to prevent them.
Shop E-Liquids Browse Pod KitsQuick answer: Vaping can contribute to mouth ulcers in some people, most commonly through dry mouth caused by propylene glycol, irritation from certain flavouring compounds, or nicotine's effect on oral tissues. It is not universal but it is a reported side effect worth addressing.
Mouth ulcers (aphthous ulcers) are small painful sores that appear on the inside of the mouth. They are very common and have many causes. Vaping can be a contributing factor for some people, but it is rarely the sole cause. Here is what the evidence suggests.
How Vaping May Contribute to Mouth Ulcers
| Mechanism | How it causes ulcers | Most likely culprit |
|---|---|---|
| Dry mouth | Saliva protects oral tissue. PG reduces saliva, leaving mucosa vulnerable | High-PG e-liquids, frequent vaping |
| Nicotine | Reduces blood flow to oral tissues, impairing healing | High-nicotine liquids |
| Flavouring irritants | Certain compounds, especially cinnamaldehyde (cinnamon) and acidic flavours, irritate oral mucosa | Cinnamon, citrus and sour flavours |
| Heat from vapour | Repeated exposure to warm vapour can irritate delicate tissue | High-power devices, long puffs |
| PG sensitivity | Some individuals react to PG with oral inflammation | Any PG-containing liquid |
Which Vapers Are Most at Risk?
Mouth ulcers from vaping are more likely if you already have a tendency to get them. Vaping can tip the balance for people whose oral health is already challenged by dry mouth, stress, nutritional deficiencies or a susceptibility to aphthous ulcers. If you rarely got mouth ulcers before vaping and are now getting them regularly, vaping is a reasonable suspect.
Relative risk factors for vaping-related mouth ulcers
Longer bar = higher contribution to mouth ulcer risk.
What You Can Do to Reduce the Risk
- Switch to a higher VG e-liquid to reduce the drying effect of PG on your mouth
- Avoid cinnamon, sour and very sweet dessert flavours which are more likely to irritate oral tissue
- Drink more water throughout the day to counteract dry mouth
- Reduce your nicotine strength to lessen the vasoconstrictive effect on oral tissue
- Use a fluoride mouthwash daily to maintain oral tissue health
- Take breaks from vaping to allow your oral mucosa to recover
When to see a dentist or GP: Most mouth ulcers heal within 1 to 2 weeks. If an ulcer lasts longer than 3 weeks, is unusually large or painful, or if you are getting them very frequently, see a dentist or GP. In rare cases, persistent mouth ulcers can indicate an underlying condition that needs attention.