Lung cancer frequently presents without early symptoms, so awareness and screening matter. Watch for persistent cough, blood in sputum, shortness of breath, recurrent infections, unexplained weight loss, and signs of metastasis. Smoking causes the majority of cases; quitting, avoiding secondhand smoke, radon testing, workplace protections, and annual low-dose CT for eligible high-risk adults help reduce risk and improve chances of early detection.

Why early detection matters

Lung cancer often produces no symptoms in its earliest stages, so many cases are diagnosed only after the disease has progressed. Finding lung cancer early, when it is still localized, gives patients more treatment options and better outcomes.

Common warning signs to watch for

A persistent or new cough is the most common symptom. Other signs include:
  • Coughing up blood (even a small amount)
  • A cough that worsens or a change in a chronic "smoker's cough"
  • Shortness of breath or new wheezing
  • Recurrent pneumonia or bronchitis
  • Chest, shoulder, or back pain that worsens with deep breaths
  • Hoarseness
  • Unexplained weight loss, loss of appetite, or persistent fatigue
These symptoms can have many causes, but any new, persistent, or unexplained change should prompt a conversation with a clinician.

Symptoms that suggest spread (metastasis)

If lung cancer spreads, symptoms can reflect the affected organs:
  • Bones or spine: focal bone pain, back pain, or numbness/weakness in the limbs
  • Brain: headaches, seizures, vision changes, nausea, or personality/attention changes
  • Liver or lymph nodes: swelling of lymph nodes, jaundice (yellowing of skin and eyes), or further weight loss
Report new neurologic symptoms, severe bone pain, or jaundice promptly.

What causes lung cancer and how to lower your risk

Tobacco smoking is the leading cause of lung cancer and accounts for the majority of cases. Secondhand smoke raises risk as well.

Other contributors include occupational exposures (for example, asbestos), radon gas in indoor environments, and certain environmental pollutants. You can lower your risk by:

  • Quitting smoking and avoiding relapse; quitting at any age reduces risk over time
  • Avoiding secondhand smoke
  • Testing your home for radon and mitigating high levels
  • Using workplace protections against asbestos and other carcinogens

Screening: who should consider it

Annual low-dose CT (LDCT) screening can detect lung cancers earlier in people at higher risk. Current U.S. Preventive Services Task Force guidance recommends annual LDCT for adults aged 50 to 80 years who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years. Talk with your healthcare provider about whether screening is appropriate for you.

When to see a doctor

See a clinician if you have any persistent or unexplained respiratory symptoms, new neurologic symptoms, or signs of systemic illness such as unexplained weight loss. If you meet screening criteria, discuss LDCT with your provider.

Prevention, early recognition of symptoms, and appropriate screening are the best defenses against lung cancer. If you're concerned about risk or symptoms, contact your healthcare team.

FAQs about Lung Cancer Signs

What are the earliest lung cancer signs?
Early signs can be subtle or absent. Look for a new or changing cough, coughing up blood, shortness of breath, recurrent chest infections, hoarseness, or unexplained weight loss. Any persistent or unexplained change should prompt evaluation.
Who should get lung cancer screening?
Current U.S. guidance recommends annual low-dose CT screening for adults aged 50-80 with a 20 pack-year smoking history who currently smoke or quit within the past 15 years. Discuss eligibility with your healthcare provider.
Can quitting smoking reduce my risk?
Yes. Quitting smoking at any age lowers your lung cancer risk over time. Avoiding relapse and reducing exposure to secondhand smoke further decreases risk.
What symptoms indicate the cancer may have spread?
Spread to bones can cause focal bone or back pain and limb numbness. Brain metastases may cause headaches, seizures, vision changes, or cognitive changes. Liver or lymph node involvement can cause jaundice or swollen nodes.

News about Lung Cancer Signs

Six symptoms that could be a sign of lung cancer - even if you have never smoked - Birmingham Live [Visit Site | Read More]

Heed Lung Cancer Month In November - Down News Online [Visit Site | Read More]

Lung cancer is showing up in younger adults and smoking isn’t the only cause - Loma Linda University [Visit Site | Read More]

What Patient Stories Teach Us About Lung Cancer - 23andMe Blog [Visit Site | Read More]

The health issues that could be an early sign of lung cancer - The Independent [Visit Site | Read More]

AI-Enabled Lung Nodule Clinic Launched to Boost Early Lung Cancer Detection - ET HealthWorld [Visit Site | Read More]

My husband was convinced he was secretly being filmed - months later he was dead - The Sun [Visit Site | Read More]

If you experience these symptoms repeatedly, you could have lung cancer: “You should see a doctor” - Diario AS [Visit Site | Read More]