I suddenly got acne on my forehead. How can I soothe it?

I used to get a few pimples on my cheeks but rarely, but

It looks like volcanic rock on my forehead now. Only on my forehead.

It's not turning red, but it broke out really severely like hives.

At first, only one or two appeared, so I just ignored them, but they got too severe. I wonder if it's because I touched them?

It spreads to the sides, and if I don't cover it with my bangs, I'm so embarrassed that I can't even show my forehead.

How should I soothe my forehead when I have a lot of acne like this?
I don't think I ate anything particularly wrong, but seeing this turn out like this is giving me a lot to worry about.

How do others manage acne on their foreheads?

I would appreciate it if you could share any good tips or cosmetics you have.