Smoking marijuana can have various effects on one's oral health, and dentists may be able to identify certain signs that suggest cannabis use. These signs can include dry mouth, which can lead to an increased risk of cavities and gum disease, and changes in the appearance of the gums, which may become red and swollen.
Dentists may also notice a specific odor on the breath or a coated tongue, which can be indicative of marijuana use. Additionally, cannabis use can affect the immune system, potentially making individuals more susceptible to oral infections and other health issues.