Kudos Emma F. Stone, Ph.D. (Not the actress) for yet another in a long line of well-written pieces for Leafly

Have a read about #Xerostomia (= #Cottonmouth)
As cannabis becomes universal, the absence of protective saliva in the mouth + changes in oral colonies of bacteria, symbiotic species of fungus, and some locally harmful effects of cannabinoids may stir up some serious, unappreciated oral+dental public health issues.

https://www.leafly.com/news/health/what-causes-cannabis-cottonmouth