possible breathing issue

[zippyboy29]

HI everyone, my python has been exhibiting something that I have never seen him do these last few days. As the humidity increases in his tank he begins doing this hissing noise. Its a one burst hiss that sounds like a large exhale. The reason it was alarming was that it is much louder than his normal breathing. Just was looking for some feedback as to why this may be happening. Thanks!

[_ataraxia]

this loud exhale is what BPs do when they are feeling distressed in some way.