1. A change of mood
Depression is a frequent forerunner of lung cancer. Major depressive illness heralded a diagnosis in 16 per cent of patients, according to one study.
Anxiety, too, be a symptom of lung cancer. It’s not known why, but if you don’t usually suffer the moody blues, see the GP.
10 surprising ways to feel less anxious
2. Tiredness and fatigue
Debilitating tiredness and fatigue affect nine out of ten people before and after a lung cancer diagnosis. So says a 2011 report in the Journal of Pain and Symptom Management.
Sufferers also complain of simply not feeling themselves without being able to pin down why.
Why am I tired all the the time?
3. Digital clubbing
Not a new way to visit a nightclub, but sometimes painful thickening and reddening of the ends of the fingers and nails can be a sign of lung cancer.
Sometimes mistaken for arthritis, lung cancer, especially the non small-cell type, is the commonest lung-related cause.
What's wrong with my nails?
Why are my fingers swollen?
4. Huffing and puffing when you go upstairs
Breathlessness – or dyspnoea - is common in later-stage lung cancer. It may be mistaken for lack of fitness, asthma or chronic obstructive pulmonary disease.
5. A husky voice
If you find yourself sounding permanently like Kathleen Turner, especially if you also have a persistent cough, this could be a sign of something more sinister than a sudden increase in sexiness.
6. Pain in the shoulder
Cancers of the top part of the lungs - pancoast tumours - can damage a nerve that runs from the upper chest to the neck causing severe shoulder pain.
Other clues are a droopy eyelid, small pupil in that eye and loss of sweating on that side of the face.
Chest, back or abdominal pain, misattributed to heart or other medical conditions, may also signify lung cancer.
Other causes of shoulder pain include frozen shoulder. Find out more about frozen shoulder
7. Stairs a struggle?
Muscle weakness making everyday activities harder can be caused by Lambert-Eaton myasthenic syndrome, an autoimmune disease that disrupts transmission of nerve messages to muscles.
Although rare, the underlying cause in slightly more than half of cases is small-cell lung cancer.
8. Appetite loss
If your normally healthy appetite has deserted you and the pounds are melting away without dieting, see the doctor.
Loss of appetite and unintentional weight loss are highly associated with cancer, including lung cancer.