The respiratory system is the organs in your body for breathing, letting you exchange oxygen and carbon dioxide.

Learn about normal and abnormal lung sounds, like wheezing and rales, and how they help doctors diagnose various conditions.

Understand your body's acid-base balance, how it's controlled, and what happens when it's off, causing acidosis or alkalosis.

Lung diseases are common conditions affecting different parts of the respiratory system, from the airways to the air sacs.

Breathing problems from asthma, allergies, or infections can improve with the right diagnosis, treatment, and trigger management.

Trouble breathing, chest pain, or a chronic cough? These signs might mean more than just a cold. Learn when to call your doctor.

Struggling to breathe can signal more than lung trouble. Discover 10 surprising conditions that could be behind it.

A productive cough may signal infection or chronic illness. Find out the possible causes and treatments.

Common lung tests measure breathing, oxygen levels, and detect infections or lung damage to help diagnose respiratory problems.

A sputum culture tests mucus from your lungs to detect infections like bacteria, viruses, or fungi causing respiratory illness.

An arterial blood gas (ABG) test measures oxygen, carbon dioxide, and blood acidity to check lung and kidney function.

A pulse oximeter is a quick, painless device that measures blood oxygen levels and pulse rate to monitor lung and heart health.

Learn how pneumonia affects your lungs, who is at risk, and what symptoms to watch for along with treatment and prevention tips.

From chest pain to cough and fever, find out what pneumonia symptoms mean and when to call a doctor.

Pneumonia has many types, such as bacterial, viral, or fungal. Find out how each type spreads and how treatment varies.

Bacterial pneumonia is a lung infection that can turn serious. See who’s at risk, symptoms, and how to prevent and treat it.

Poor outdoor air quality can trigger serious illness. Learn who’s most at risk and how to protect your health.

Find out how wildfire smoke impacts your body and what steps you can take to limit the damage.

Smoke inhalation damages the body by depriving you of oxygen. Learn the causes, symptoms, and how to get help fast.

Breathing in asbestos fibers may cause severe lung problems over time. Learn about symptoms, risks, and what to do if you’ve been exposed.