The voice is usually hoarse. When your child breathes in, you hear a harsh, raspy, vibrating sound.
Breathing is very difficult.
Stridor is usually present only with crying or coughing. As the disease becomes worse, stridor also occurs when a child is sleeping or relaxed. It is usually part of a cold. Swelling of the vocal cords causes hoarseness. Stridor occurs as the opening between the vocal cords becomes more narrow.