Will it be uncomfortable to wear metal braces, and will it bleed when correcting?

No, the invisible braces I wore didn't rub my mouth, so I had to pull out one wisdom tooth on each side and save some blood. Later, my teeth were uncomfortable for the first three days of wearing braces, and I drank porridge for a few days, and then I didn't feel so bad. If you want to correct it, I suggest you do that invisible braces on Ping An Health APP. Much more comfortable than metal braces. You can take it off without grinding your mouth or eating. It is very clean.