Whistling breathing. If a person encounters this symptom, it means that they are having trouble breathing. Sometimes, people who are struggling to breathe do not notice it, but it can be diagnosed due to the sound of their breath. The whistling noise can sometimes be a very quiet squeak, or it can be a distinct, shrill sound with each breath. Some people describe it as more of a wheezing sound when they are having a lot of trouble breathing. Usually, the whistling sound happens on the exhale. However, in some cases, it can occur while a person is breathing in due to nasal congestion.
