How do you take care of your scalp?

I've been stressed about my scalp lately.
At some point, my scalp started to itch a little, and now white flakes resembling dandruff are coming off, which is bothering me.
On top of that, I have a lot of pimples popping up all over my scalp.
It keeps getting caught on my fingertips when I wash or dry my hair.
Sometimes, I touch it with my hands without realizing it, and it starts bleeding or oozing.
It’s even more frustrating because I can’t see well even when I look in the mirror since it’s blocked by my hair.

I also tried switching to a functional shampoo.
I've tried drying my scalp thoroughly with a hairdryer and occasionally using scalp scaling products, but I haven't really felt like it has improved.
How should I take care of my scalp?