Will scream singing (properly) effect the sound of your normal singing?

Yes, properly executed scream singing can affect your normal singing by strengthening your vocal cords and improving your breath control. It can also enhance your overall vocal range and power, as it requires different techniques that can translate to more traditional singing styles. However, if done incorrectly, it may lead to strain or injury, which could negatively impact your normal singing abilities. Therefore, it's essential to practice scream singing under the guidance of a qualified vocal coach.