Guys, Why does my coworker keep trying to keep our text conversation going?

So. This coworker and I are not close, not even really friends, to be honest. I had texted him earlier today for a work question. He responded hours later, which is cool, but now he keeps texting me. Me: It's okay, I figured it out lol Him: sorry Him: I have felt like absolute shit today Me: why? Getting sick? Him: I don't think so. I threw up a couple times today. Him: It's this new medication I'm on. Why does he keep texting me? He has never done this before.
Guys, Why does my coworker keep trying to keep our text conversation going?
Post Opinion