SMS affects the mood. Is it the person who cares about texting?

There are two kinds of situations. One is to care about the other party: it will take into account the other party's thoughts or the other party's current behavior trends.

The other is to care about yourself: what impact will the other party's short message have on you, and the content of the short message has caused you trouble.

You can think about whether you were thinking about yourself or the other party when you received the short message.