Cannabis and Oral Health: What Every User Should Know

Cannabis has become an important part of many people’s lives – whether for medicinal relief, relaxation, or as part of a wellness routine.  It is important to note, though, that while the benefits of cannabis are widely discussed, one area that often gets overlooked is how it can potentially have a negative impact on you – especially where oral health is concerned.

To that end, a recent clinical review¹ out of the University of Manchester took the time to look closer at this very issue.  In doing so, it sheds light on how cannabis – particularly when smoked or consumed regularly – can influence your teeth, gums, and even how your dentist treats you.

Dry Mouth, Cavities, and Cannabis: What’s the Connection?

One of the most common side effects of cannabis use is dry mouth, or xerostomia.  You may have noticed it yourself – cottonmouth kicks in after a joint, an edible, or even some CBD oils.  This happens because cannabis affects your saliva glands, reducing their ability to keep your mouth moist.

Tips to fight dry mouth:

• Sip water often (especially plain water).
• Chew sugar-free gum to stimulate saliva.
• Avoid alcohol-based mouthwashes that can dry your mouth even more.

Why does that matter? Saliva plays a crucial role in protecting your teeth.  Without enough of it, bacteria thrive, acids build up, and your risk of cavities and gum disease goes way up.  This may not be much of an issue for infrequent users, but for those who use cannabis regularly – whether medicinally or otherwise – concern is warranted.

The Munchies Can Harm More Than Your Waistline

THC, the primary psychoactive compound in cannabis, is well-known for increasing appetite – what we all call the munchies.  Aside from unnecessary calories, there is one big issue: many choose to snack on sugary foods, and while your mouth is dry, it is a perfect storm for tooth decay.

Sticky sweets, candy, and processed snacks feed harmful bacteria that erode tooth enamel.  Combine that with less saliva, and you’ve got a recipe for plaque buildup, gingivitis, and eventually even tooth loss.

Smarter snacking:

• Choose crunchy fruits and vegetables like apples or carrots that help clean your teeth.
• If you do go for sweets, rinse with water afterward or brush your teeth if you can.
• Keep track of late-night snacking habits—small changes can make a big difference.

For a closer look at what goes into making a smart snack choice, make sure to visit our look at how to satiate those munchies effectively.

Is Cannabis Use Linked to Oral Infections or Cancer?

Unfortunately, there is research that suggests it might be.  Regular cannabis smoking has been associated with higher rates of oral infections like candidiasis (a fungal infection), as well as white patches in the mouth (leukoplakia), which can sometimes develop into more serious issues.

There’s also emerging evidence of a link between chronic cannabis use and oral cancers, though more studies are needed.  Either way, this highlights the importance of regular dental checkups—especially if you’re a long-term user.

Could Cannabis Affect Your Dental Visits?

Yes – and not just because of your teeth.  Cannabis can also:

• Raise your heart rate or trigger arrhythmias, which could make dental procedures riskier.
• Interfere with local anesthetics, especially those with epinephrine.
• It impacts your ability to consent to treatment if you’re high during your appointment, which is surprisingly common.

In fact, dentists are encouraged to reschedule appointments if a patient shows up visibly under the influence. So, for your safety and best care, it’s a good idea to avoid using cannabis before a visit.

What You Can Do to Protect Your Oral Health

Being a cannabis user doesn’t mean you’re destined for dental problems.  In fact, to stay ahead, all of the proactive measures recommended should be a part of your daily health care routine anyway:

Brush and floss daily — especially after cannabis use.
Use fluoride toothpaste to strengthen your enamel.
Visit your dentist regularly — they’ll help catch issues early.
Stay hydrated to combat dry mouth.
Keep track of your habits — noting when and how you use cannabis can help you understand patterns that might affect your health.

And most importantly, be honest with your dentist.  They’re not there to judge you.  Sharing that you use cannabis – how often and in what form – will help them tailor your care for better outcomes.

Final Thoughts

Cannabis has many well-known benefits, but like anything we consume regularly, it can come with side effects.  With common side effects like dry mouth and sugar cravings, each compounding risk makes it crucial to take your oral health seriously.

If you use cannabis – especially if it’s daily – consider broaching the topic with your dentist in the event of any issues.  With a few simple steps, you may just be able to protect your teeth, gums, and overall health while still enjoying the benefits cannabis brings.

Studies Referenced:

^{1. Dave, M., & Patel, N. (2025). The clinical implications of cannabis use in dentistry. BDJ Team. https://doi.org/10.1038/s41407-025-2927-9}