What Causes Drooling?

baby drooling
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Drooling, or sialorrhea, is saliva draining outside of the mouth. Drooling is common in several disorders related to the ears, nose and throat, as well as certain neurological disorders. For infants and toddlers, drooling is a sign of teething and is nothing to be concerned about, but it's important to be aware of the various conditions that are associated with drooling. In some rare cases drooling is a sign of a life-threatening illness.

What Causes Drooling?

In most cases drooling is caused by the overproduction of saliva, problems swallowing and problems keeping saliva inside the mouth. Some people with drooling problems are at a greater risk of breathing saliva, food or fluids into the lungs, which could cause a serious problem if the body's gagging and coughing reflexes are not functioning properly. 

Certain infections can cause the overproduction of saliva and drooling. These include:

Other conditions that can cause the overproduction of saliva include:

  • Epiglottitis
  • Sore throat
  • Nasal obstruction
  • Allergies
  • GERD
  • Pregnancy (due to side effects)
  • Swollen tongue or adenoids
  • Muscular dystrophy
  • Anaphylaxis
  • Use of certain medications

Drooling is also caused by nervous system disorders that cause difficulty swallowing:

  • Amyotrophic lateral sclerosis (ALS)
  • Down syndrome
  • Multiple sclerosis
  • Autism
  • Stroke

When to Seek Medical Care

Drooling in infants and toddlers isn't usually cause for concern. If you or someone you care for is dealing with excessive drooling, see your health care provider if:

  • The drooling is not related to teething or a chronic condition.
  • The drooling occurs suddenly.
  • The cause of drooling is undiagnosed.
  • There is concern about gagging or choking on saliva.
  • A child has a fever, difficulty breathing or is holding their head in an odd position.

Neglecting medical attention can lead to greater complications, from difficulty swallowing to aspiration, or choking, a emergency situation.

How Drooling Is Treated

Treatment of drooling depends on the specific disorder and determining the root cause. For example, if drooling is the result of an infection, sometimes antibiotics are used. If drooling is the result of severe tonsillitis, the tonsils may have to be surgically removed.

In cases where the underlying cause cannot be cured, medications such as drops, pills and liquid medicine can be utilized to treat drooling. Scopolamine patches, glycopyrrolate, and botulinum toxin are medications that can be used to decrease the amount of production from salivary glands. Severe cases of drooling can be treated with Botox shots, radiation to the salivary glands and removal of the salivary glands.

For children who are drooling with teething, chewing on popsicles and other cold objects, such as teething rings and frozen bagels, can help curb saliva production.

Be sure to monitor the child to prevent choking. For those dealing with chronic drooling, try to limit sugary food consumption, as sugar increases saliva production. Be cognizant of any skin breakdown around the mouth. If you are a caregiver, remind the person you are caring for to keep their mouth closed and chin up.



Medline Plus. (2014). Drooling. Accessed: March 26, 2016 from http://www.nlm.nih.gov/medlineplus/ency/article/003048.htm

Hockstein, N.G., Samadi, D.S., Gendron, K.,& Handler, S.D. (2004). Sialorrhea: a management challenge. American Family Physician. 2004 Jun 1:69(11):2628-2635. Accessed: September 4, 2011 from http://www.aafp.org/afp/2004/0601/p2628.html

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