<unk>  or sialorrhea can occur during sleep. It is often the result of open-mouth posture from CNS depressants intake or sleeping on one's side. 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. Freud conjectured that<unk>  occurs during deep sleep, and within the first few hours of falling asleep, since those who are affected by the symptom suffer the most severe harm while napping, rather than during overnight sleep. A sudden onset of<unk>  may indicate poisoning – especially by pesticides or mercury – or reaction to snake or insect venom. Excess capsaicin can cause<unk>  as well, an example being the ingestion of particularly high Scoville Unit chili peppers. Some neurological problems cause<unk> . Medication can cause<unk> , either due to primary action or side-effects; for example the pain-relief medication Orajel can numb the mucosa. Causes include: * exercise, especially cardiovascular exercise * stroke and other neurological pathologies * intellectual disability * autism * adenoid hypertrophy * cerebral palsy * amyotrophic lateral sclerosis * tumors of the upper aerodigestive tract * Parkinson's disease * rabies * mercury poisoning<unk>  associated with fever or trouble swallowing may be a sign of an infectious disease including: * retropharyngeal abscess * peritonsillar abscess * tonsilitis * mononucleosis * strep throat * obstructive diseases (tumors, stenosis) * inability to swallow due to neurodegenerative diseases (amyotrophic lateral sclerosis)
Drooling
Ptosis 
Facial toning
Stuttering
Sniffing 
Anismus
Dysphagia
Trismus