Hi everyone, noticed a buddies nile monitor had bubbles coming from its nose when I visited. Asked about it and apparently that's the first time it happened.
Some questions:
Could that be from getting water in the nostril? it was only 1 nostril
Could it be from substrate getting in there?
Could it be normal amounts of saliva but the monitor was very excited because he was eating at the time and saliva came out through the nostril because his mouth was closed?

Some info:
His monitors basking spot is at 145-150f
Cool side ranges in spots from 70-75, and 75-80
Mid enclosure is 80-85
Hot side is 90
Humidity ranges from 60-70-100%
Ambient temp is upper 80s

Any info is appreciated as he is very worried about an RI. Although I have read it is normal for them to sneeze and blow bubbles once in a blue moon due to water getting into their nose, or substrate. Wanted to tell him that but thought I'd wait for more experienced people to chime in so I am posting here.

Any help appreciated and I will convey it to my buddy
Thanks,
-Mike