Only if it negatively impacts your life.

This is also, generally speaking, the line between, say, having obsessive compulsions and having OCD. So if anyone is looking for a way express "haha, I'm totally ocd" without sounding dismissive of people with a serious disorder, just say "sometimes I have obsessive compulsions". That would imply it's nothing serious.

Same for PTSD. It's ok to experience post-traumatic stress after something "rather banal", like I don't know, seeing a stranger break their leg. And calling post-traumatic stress is fine. Just don't say "that baby on the airplane gave me ptsd." That's quite dismissive.

Anyone that needs help, go get it. Don't let that your problem feels banal be an impediment. If something is impacting your life negatively, tune it up.