Lung cancer is one of the most common cancers to be diagnosed in the UK, said the NHS.
Almost 45,000 people are diagnosed with lung cancer every year in the UK.
There are usually no signs or symptoms of the condition, but many people can develop some tell-tale signs.
One of those symptoms is small bumps on the surface of the skin, said the American Cancer Society.
Most lung cancers do not cause any symptoms until they have spread, but some people with early lung cancer do have symptoms
Lumps and bumps near to the surface of the skin could be warning signs of lung cancer.
Finding the lumps on your skin could be a sign that the cancer has spread to the skin, or to the lymph nodes.
The lumps are most likely to develop in the neck, or under the arms. They may be confused for swollen glands, it warned.
“Most lung cancers do not cause any symptoms until they have spread, but some people with early lung cancer do have symptoms,” said the American Cancer Society.
“If you go to your doctor when you first notice symptoms, your cancer might be diagnosed at an earlier stage, when treatment is more likely to be effective.
“If lung cancer spreads to distant organs, it may cause lumps near the surface of the body, due to cancer spreading to the skin or to lymph nodes [collections of immune system cells], such as those in the neck or above the collarbone.
“Most of these symptoms are more likely to be caused by something other than lung cancer.
“Still, if you have any of these problems, it’s important to see your doctor right away so the cause can be found and treated, if needed.”
The most common warning signs of lung cancer are a cough that doesn’t go away or gets worse over time, and coughing up blood.
Chest pain could be a sign of lung cancer - especially if it gets worse with deep breathing, coughing or laughing.
Feeling short of breath, fatigue, and the sudden onset of wheezing should also be seen by a doctor, it added.
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Lung cancer mainly affects people between the ages of 70 and 74 years old, added the NHS.
Smoking is the most common cause of lung cancer diagnosis. More than 85 per cent of cases are caused by smoking.
You could lower your chances of lung cancer by eating a low-fat, high-fibre diet, it said.
Your diet should include at least five portions of fruit and vegetables and plenty of wholegrain.
About one in three lung cancer patients live for a year after they’ve been diagnosed.