Crackling sound when breathing lying down on left side

Crackling or rattling sounds in the lungs can be concerning.

Bibasilar crackles

Often, people wonder if lung crackles are serious enough to warrant a trip to the doctor. Understanding the common causes of lung crackles and when to seek medical care can help people make informed decisions about their health.

Typically, new crackling or rattling lung sounds do require an evaluation by a healthcare provider.

What Causes Crackling Sounds in the Lungs?

Crackling sounds in the lungs are caused by the popping open of small airways and air sacs (alveoli) in the lungs.

As these airways open, air moves through them, causing a crackling sound. Here are some common causes of lung crackles:

Pneumonia

Pneumonia is an infection of the lungs often caused by bacteria, viruses, or fungi.

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As the air sacs fill with fluid and pus, they can make crackling sounds when opening. Pneumonia is one of the most common reasons for new crackles.

Pulmonary Fibrosis

Pulmonary fibrosis is a lung disease marked by scarring of lung tissue.

This scarring makes the lungs stiff and less elastic. As the stiff lungs expand, crack

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