Can someone please explain this to me

Because they are in your head and your brain is manifesting them

When that happens, name something u can feel, name something u can taste, name something thats real, u gotta bring ur sences back, take deep and slow breaths try splashing cold water in ur face, or eat something super sour or hot, something that gets ur mimd to figure out whats real and what isnt, if u see something scary or somethong u dont understand just tell urself its not real, it cannot harm me, I will not let it harm me. Being around others might help to

Don't let them come over you
Keep your mind busy in some activities that keeps you away from hallucinations
Keep yourself in reality

When you learn to hit back they will be gone for ever.

Oh, very interesting question. You need to learn the right attack, whether it be a bite, or saying no, you can't have me anymore. Show them the proverbial door to those occupying your mind.

When you learn that it is all in your mind
Then you will be in control it is your mind you control everything

Why can’t you attack back?