There are some frequent and harmless cases of drooling – for instance, a numbed mouth from either benzocaine, or when going to the dentist's office.

Sometimes while sleeping, saliva does not build up at the back of the throat and does not trigger the normal swallow reflex, leading to the condition.

Other drugs used are glycopyrrolate and botulinum toxin A – botox injection in salivary glands to diminish saliva production.

[5][6][7] In general, surgical procedures are considered after clear diagnosis of the cause and evaluation of non-invasive treatment options.

[citation needed] The scope of the meaning of the term drool in popular use has expanded to include any occasion wherein someone highly desires something.