Is nail clubbing a sign of cancer, and what should I do next?

There are many causes of clubbing of the fingers. Clubbing can be due to lung diseases, heart problems, liver diseases, thyroid dieases and malignancy. In some people, the cause is idiopathic ie. there is no undelying cause.

Clubbing is often caused by chronic hypoxia or chronic low oxygen levels. Smoking may cause lung diseases like bronchiectasis which can cause clubbing and it is advisable to quit smoking if possible. While lung cancer can cause clubbing, this would be an uncommon cause in your age.

The diagnosia of clubbing requires a good history and examination to determine the underlying cause. Some investigations may be needed to rule out an underlying cause. You should let your doctor know of your concerns so that a proper assessment can be carried out for you.

I totally agree with Dr Theng. If you have further concern, talk to the doctor who have done the tests. If all the history, examination and investigation have been done, then the next thing you should focus on will be to stop smoking.

No point worrying about something you create which will then lead to more worries. Stop especially if it has already caused clubbing of your nails.

Good luck!