Lifestyle
A Cough That Won’t Go Away Can Be an Early Sign of Lung Cancer. Other Signs Not to Ignore
By Mike Harper · October 30, 2026
Most coughs clear up on their own once a cold or a bout of allergies runs its course. A cough that hangs on for weeks, or one that slowly gets worse, is different and deserves a doctor’s attention.
The Centers for Disease Control and Prevention lists coughing that gets worse or doesn’t go away first among the symptoms of lung cancer. Mayo Clinic describes it as a new cough that doesn’t go away.
The catch is that early lung cancer is often silent. The CDC says most people with lung cancer don’t have symptoms until the cancer is advanced, and the American Cancer Society says most lung cancers do not cause any symptoms until they have spread, though some people with early lung cancer do have them.
Coughing up blood. Mayo Clinic says to pay attention to coughing up blood, even a small amount. The cancer society also lists coughing up rust-colored spit or phlegm.
Chest pain. The cancer society says the chest pain is often worse with deep breathing, coughing or laughing.
Shortness of breath and wheezing. Both appear on the CDC and Mayo Clinic lists. The cancer society lists new wheezing.
Hoarseness. It appears on the lists from Mayo Clinic, the cancer society and the National Cancer Institute.
Chest infections that keep coming back. The cancer society lists bronchitis and pneumonia that don’t go away or keep coming back, and the CDC mentions repeated bouts of pneumonia.
Weight loss, poor appetite and fatigue. The CDC lists weight loss with no known cause and feeling very tired all the time. Mayo Clinic and the NCI list loss of appetite.
Other changes. The NCI also lists trouble swallowing and swelling in the face or veins in the neck. When the cancer spreads, the cancer society says it can cause bone pain, such as pain in the back or hips, along with headaches and other nervous system changes.
The CDC says these signs can happen with other illnesses and advises talking with your doctor to help find the cause.
Smoking causes most lung cancers, according to Mayo Clinic, and the risk climbs with the number of years and cigarettes smoked. But the clinic notes that lung cancer also happens in people who have never smoked. Other risk factors it lists include secondhand smoke, radon gas that can build up in homes, past radiation to the chest, workplace exposure to substances such as asbestos, and a parent, sibling or child with lung cancer. Quitting smoking at any age significantly lowers the risk, the clinic says.
For people at higher risk, screening can find lung cancer before symptoms start. The U.S. Preventive Services Task Force recommends annual screening with low-dose computed tomography for adults ages 50 to 80 who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years. A pack-year equals smoking an average of one pack a day for a year, so one pack a day for 20 years or two packs a day for 10 years both count as 20 pack-years, the CDC explains.
The task force says screening should stop once a person has not smoked for 15 years or develops a health problem that substantially limits life expectancy or the ability or willingness to have lung surgery. The CDC notes screening has risks, including false-positive results and radiation from repeated scans, and says most insurance plans and Medicare help pay for recommended screening.
This article is for general information and is not medical advice. Talk with your doctor about a cough that lingers or any symptom that worries you, and ask whether lung cancer screening is right for you. This article was produced with the assistance of AI and fact-checked against the sources cited by LightWave Reports.