Lots of reasons. Could be not singing properly and lack of proper use of the diaphram--pushing up on the chest voice--singing notes that are too high for the individuals particular chest range when they should be transtioning into the head voice instead, causing strain on the vocal chords. You usually see the veins bulging form the neck when this occurs, as well as a red face. Also, singing while sick, especially belting when the throat and esophagus are inflamed, or not drinking enough water, or not warming up properly before singing. Singing may not even have anything to do it, rather speaking improperly. This happened to my brother. He doesn't sing, but sure likes to talk and found out he was doing it improperly.
Posted on Mar 3, 2008, 11:29 AM from IP address 18.104.22.168