How can I learn screaming vocals?

First of all just breathe as you would normally. Breathe but gently close your throat and I mean GENTLY! Only the tiniest amount - you have to find the right amount of tension in your throat for you (once you've done this the first time, you will find the amount of tension you need when you next decide to practice.

Now you will probably sound like an old man trying to breathe or kinda like a zombie lol. Okay so once you've done that I want you to do the same thing but a 'yyyyyy' sound (pretty much 'grrrr' with the letter 'Y'). Then tense your abs a little bit, in moderation with how much you close your throat up - it should then sound like a distorted whisper: that's how you get the scream sound... I told you to whisper so you don't hurt your voice yelling and doing it wrong first time around.

Do the exact same thing as that's the technique that you should be using, but to make it sound proper you need to actually shout / sing loudly... To make a scream higher in pitch, you need to ... more.

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