Sialorrhea is the medical term for excessive drooling. There are many causes of sialorrhea, although the most common cause is difficulty swallowing, either due to a neurologic problem or mechanical problem with the esophagus itself. Excessive saliva can irritate the skin and cause skin breakdown over time.


  • Drooling
  • Skin irritation in or around the mouth
  • Choking


Physical exam and patient history are generally sufficient. There is no specific test or imaging needed for the diagnosis.


Botulinum A toxin (Botox) is injected into saliva glads to reduce saliva production. The results take 1-2 weeks to reach full effect and last anywhere from 2-12 months. Most patients regularly repeat the procedure when the effect wears off.