Lung Cancer Symptoms

Lung cancer is the uncontrolled growth of abnormal cells in the lungs, and it is the leading cause of cancer-related deaths worldwide. Early stages may not cause noticeable symptoms. As the disease progresses, symptoms may include a persistent cough, coughing up blood, chest pain, shortness of breath, hoarseness, unexplained weight loss, and recurrent lung infections such as pneumonia or bronchitis.

• Causes: Genetic mutations triggered by carcinogens, especially tobacco smoke.
• Risk factors:

Smoking (primary risk factor; includes current and former smokers)

Secondhand smoke exposure

Radon gas exposure in homes

Occupational exposure (asbestos, arsenic, diesel exhaust)

Family history of lung cancer

Prior radiation therapy to the chest

See a doctor if you experience a persistent or worsening cough, coughing up blood, unexplained chest pain, or weight loss. Seek immediate care for severe shortness of breath or chest pain. People with a history of smoking or other strong risk factors should discuss lung cancer screening (low-dose CT scans) with their healthcare provider.