Chest indrawing is the inward movement of the lower chest wall when the child breathes in, and is a sign of respiratory distress. Chest indrawing does not refer to the inward movement of the soft tissue between the ribs. Stridor is a harsh noise heard when a sick child breathes in.
Wheezing most commonly seen lower respiratory obstruction.like whistling and continue and heard during expiration but stridor obstruction airway outside chest cavity and hight pitch sound