Drooling is saliva flowing outside the mouth.

Drooling is generally caused by too much saliva production, problems keeping saliva within the mouth, or problems with swallowing.

Some people with drooling problems are at increased risk of breathing in saliva, food, or fluids into the lungs. However, this may cause harm if there is a problem with the body's normal reflex mechanisms (such as gagging and coughing).

Occasional drooling in infants and toddlers is normal and is unlikely to be a sign of either disease or problem. It may be associated with teething. Drooling in infants and young children may get worse with upper respiratory infections and nasal allergies.

Drooling associated with fever or trouble swallowing may be a sign of a more serious disease, including:

• Retropharyngeal abscess
• Peritonsillar abscess
• Tonsillitis
• Mononucleosis
• Strep throat

Sudden drooling may indicate poisoning (especially by pesticides) or a reaction to snake or insect venom.

Other things that can cause drooling:

• Certain medications
• Neurological problems

Care for drooling due to teething includes good oral hygiene. Popsicles or other cold objects (such as frozen bagels) may be helpful. Care must be taken to avoid choking when a child uses any of these objects.

Call your health care provider if:

• Your child has a fever, difficulty breathing, or holds his or her head in a funny position.
• There is concern about aspiration.
• The cause of the drooling has not been diagnosed.

The doctor will perform a physical examination and ask questions about the symptoms, including:

• Is there a history of any other diseases?
• Has the person had a bite or sting?
• Has the person had an injury?
• What medications are being taken?
• What other symptoms are present ( fever, sore throat, facial droop, or other symptoms)?

The diagnostic tests performed depend on the symptoms that accompany the drooling.