Congenital heart disease - when do you get clubbing of the fingers?

Later: This complication usually occurs in late toddler stage and older.

With low oxygen: One of the main causes of clubbing (where the tip of your fingers become bulbous appearing) is long standing low blood oxygen as a result of heart abnormalities that prevent full passage of blood through the lungs (why this happens is not clear). Liver disease can also cause clubbing so you should see your doctor for an accurate diagnosis.