Office etiquette question

Seriously: could there exist any medical reason why someone would need to spit very noisily -- that is, putting great vocal effort into creating and then and expectorating a significant phlegm-ball -- every time they visit the bathroom, with multiple loogie-hawkings per visit?

I am pondering leaving a note for this person, whose identity I have yet to verify, since it outgrosses my colleagues and I, who sit next to the bathroom, very much, but I don't want to seem insensitive if there's a chance that this person has a condition of some sort...