What does the sentence "I was hit by youth" mean?

It means that some things I experienced in my youth are very touching. And it is not a word that can be described as happy or unhappy.

After I was hit by youth, are you going to embrace it, or have some feelings changed some ways of doing things? In fact, the main meaning is that people feel a lot in it, and they are still young, and they have changed themselves who are too ignorant in those years! Don't look at it from the surface, look at it from the connotation, which means: you have encountered setbacks on the road to youth.