How to Scream Sing

You may have imitated vocalists in bands like Linkin Park, System of a Down, or Slipknot, attempting to crush the vocal screams you've heard in songs by these groups. But without proper form and technique, you could permanently damage your voice this way. If you want be able to scream (and talk!) long term, you'll need to do it the right way. This isn't a "no pain, no gain" situation. You have to protect your voice while screaming your lungs out. And with the right approach, you'll sound great doing it! 
Warning: Scream-singing can cause damage to your vocal cords if done improperly. If you feel any pain or discomfort, take a break from practicing for a while to let your vocal cords rest.