Lung cancer symptoms develop as the condition progresses, according to the NHS.
There are usually no signs or symptoms of the disease in its early stages.
Signs of the condition may develop after a while, and can include feeling short of breath and unexplained weight loss.
Feeling dizzy could also be a sign of lung cancer, said Cancer Research UK.
“Some types of lung cancer cells produce hormones that go into the bloodstream,” the charity said.
“These hormones can cause symptoms that don’t seem related to the lung cancer.”
Dizziness or drowsiness could be caused by the hormones. Together, the symptoms are known as paraneoplastic syndrome.
Having pins and needles, blood clots, muscle weakness, or breast swelling in men could also be signs of the syndrome.
Other symptoms of lung cancer include a cough that doesn’t go away after two or three weeks, and persistent chest infections.
Feeling breathless, persistent tiredness, and having an ache or pay while breathing may be signs of the disease, the NHS said.
The American Cancer Society added: “Most lung cancers do not cause any symptoms until they have spread, but some people with early lung cancer do have symptoms.
“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.”
You could lower your risk of lung cancer by eating a low-fat, high-fibre diet, the NHS said.
Make sure you eat at least five portions of fresh fruit and vegetables everyday, along with plenty of whole grains.
Exercising for at least 150 minutes every week could slash your chances of developing the disease.
About 45,000 people are diagnosed with lung cancer every year in the UK.