Cotton Mouth
Definition: Cotton mouth is the dry, sticky feeling in your mouth after using cannabis. The medical term for dry mouth is xerostomia. It happens because cannabinoids like THC temporarily reduce saliva production. It’s harmless in the short term and usually fades within a few hours as the effects wear off.
Why Does Weed Give You Cotton Mouth?
Your salivary glands contain cannabinoid receptors. Animal research suggests that when THC activates them, it dampens the nerve signals that tell those glands to make saliva. Less saliva means a dry, cottony mouth, whether you smoke, vape, or eat edibles. Smoke can make it feel worse by drying out the tissues in your mouth and throat.
How Do You Get Rid of Cotton Mouth?
- Drink water before, during, and after your session
- Chew sugar-free gum or suck on sugar-free candy to stimulate saliva
- Skip alcohol and caffeine, which dry you out further
- Run a humidifier in your room at night
- Try an alcohol-free mouthwash or a saliva-substitute spray
Is Cotton Mouth Bad for Your Teeth?
Occasional cotton mouth isn’t a problem. Chronic dry mouth is a different story. Saliva protects your teeth by washing away food and neutralizing acids, so regular heavy use without enough hydration can raise your risk of cavities and gum disease. If dry mouth lasts well beyond your high or happens every day, mention it to your dentist.
Related terms: THC, Cannabinoid Receptors, Couch Lock, Tolerance Break
Sources: National Institute of Dental and Craniofacial Research: Dry Mouth; National Institute on Drug Abuse: Cannabis (Marijuana).
