The thin layer of tissue that covers the lungs and lines the chest cavity is known as the pleura. The tissue normally secretes a small amount of fluid that acts as a lubricant, helping the lungs move while breathing.
When fluid increases and builds up in the pleural space, it’s called a pleural effusion. This can cause chest pressure, difficulty breathing or a low oxygen level.
The extra fluid can even push on a lung until part of it collapses. Removing the fluid allows the lung to expand, making breathing easier.
Symptoms of pleural effusions include:
Chest pain made worse with cough or deep breaths
Cough
Fever and chills
Hiccups
Rapid breathing
Shortness of breath
Conditions like heart failure, cancer, a lung injury or pulmonary embolism can lead to pleural effusions.