Why It Matters
Finger clubbing is not a disease in itself, but rather a physical sign of an underlying health condition. In some cases, it can be linked to lung cancer. Studies have found that finger clubbing appears in about 35% of people with non-small cell lung cancer (NSCLC) and about 4% of those with small cell lung cancer.
Although lung cancer is a major concern, clubbing can also occur with other illnesses, such as chronic lung infections, heart disease, and certain digestive disorders. This is why noticing changes in your fingernails should always prompt a discussion with a healthcare professional.
