What causes a word in your post to become highlighted in red if you did not do it?

[KidsHappen]

In an earlier thread one of the words I used in several of my posts became highlighted in red. I did not do this myself so I am curious as to how it happened. It only happened after I did a search on that term and posted the last time so I am wondering if perhaps it is related to the search or maybe the number of times your post a certain word in a thread. Anyone know? :confused:

[KidsHappen]

:confused::confused:

[chiguirre]

Search terms are highlighted in red.

Hey, I answered a tech question! :D

[OnTheBrink]

I only see red highlighted words in threads where I've done a search for something. Like, if I'm looking for threads that discuss MUS, MUS is in red in every posts of my search result. Have you been searching for anything lately? Maybe you were reading that thread and forgot you'd searched it.