頭がいっぱいです。の英語

I've been preoccupied.

My brain is full.

My head hums.

I am smart.

I am twisted.

My mind is heavy.

I am flipping out.

I am going crazy.

I am freaking out.

My head is swimming.

My head has begun to clear.

I'm a bit out of it.

the function of the brain

I'm feeling confused.

I'm feeling dizzy.

I have a lot on my mind about that.

My head is full with that.

I feel out of it.

He has a coarse brain.

My head is full of those things.

He has an acute intellect.

toss one's head (back)

to scratch one's head―（恥じてなら）―hang one's head for shame

to scratch one's head

He/She is really clever.

the condition of being smart and quick to understand

Aren't I clever?

quick‐witted

to condemn one without a hearing

Something is wrong with my head.