Hello, although smoking Cannabis is unlikely to increase your risk of developing oral cancer, there are still some dental hazards patients should be aware of. A patient may developed xerostomia or a dry mouth, which is a common side effect of smoking marijuana. Cannabinoids bind to receptors located in the submandibular glands, which causes a loss of ability to receive input from the nervous system, causing a disruption in normal saliva production. Dry mouth can cause your gums to bleed, altered sense of taste and accumulation of dental plaque. When smoking, be sure to keep water on hand or consider switching from smoking to vaporizing, which involves steam.