If you are excited, you are so happy that you cannot relax, especially because you are thinking about something pleasant that is going to happen to you.
I was excited about the possibility of playing football again.
想到有可能再次踢足球,我很兴奋。
If you are excited, you are worried or angry about something, and so you are very alert and cannot relax.
I don't think there's any reason to get excited about inflation.
我认为没理由因通货膨胀而焦虑。