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Warm up your voice before you scream sing. Scream sing into a microphone to conserve your voice. Drink water during breaks from singing. Let your voice rest if your throat is irritated.
Warm-ups will better prepare your voice for scream singing so it’s not as vulnerable to damage. Try to do a few different singing warm-ups before every practice session or performance.  Start your warm up with a simple lip buzz. Close your lips and then vibrate them so they’re rapidly hitting against each other. Hold your pitch for a few seconds and then go up or down a pitch. Keep vibrating your lips and trying different pitches.  You can also warm up by singing “mah-may-me-mo-moo.” Using one note, sing “mah-may-me-mo-moo” slowly but all in one breath. Once you finish, sing it again, this time going one note higher. Continue until you’ve gone all the way up the scale. Scream singing can place a lot of strain on your vocal cords, especially if you’re trying to project your voice. Use a microphone whenever you’re performing (or practicing if you want to sing loudly) so you don’t need to project your voice as far. Be careful not to scream sing too loudly into a microphone. You don't want to damage listeners' ears. Whether you’re practicing or performing, it’s important that you keep your vocal cords hydrated when you’re scream singing. If you’re performing, bring a bottle of water on stage with you and take a few sips after each song. Even when you’re using proper technique, scream singing can wear out your voice. Continuing to sing with aching or damaged vocal cords will only make the problem worse. Listen to your body and take a break so your voice has time to heal.