Clubbing is changes in the areas under and around the toenails and fingernails that occur with some disorders. The nails also show changes.
Common symptoms of clubbing:
- The nail beds soften. The nails may seem to "float" instead of being firmly attached.
- The nails form a sharper angle with the cuticle.
- The last part of the finger may appear large or bulging. It may also be warm and red.
- The nail curves downward so it looks like the round part of an upside-down spoon.
Clubbing can develop quickly, often within weeks. It also can go away quickly when its cause is treated.
Lung cancer is the most common cause of clubbing. Clubbing often occurs in heart and lung diseases that reduce the amount of oxygen in the blood. These may include:
Other causes of clubbing:
When to Contact a Medical Professional
If you notice clubbing, call your health care provider.
What to Expect at Your Office Visit
A person with clubbing often has symptoms of another condition. Diagnosing that condition is based on:
- Family history
- Medical history
- Physical exam that looks at the lungs and chest
The provider may ask questions such as:
- Do you have any trouble breathing?
- Do you have clubbing of the fingers, toes, or both?
- When did you first notice this? Do you think it is getting worse?
- Does the skin ever have a blue color?
- What other symptoms do you have?
The following tests may be done:
There is no treatment for the clubbing itself. The cause of clubbing can be treated, however.
Davis JL, Murray JF. History and physical examinations. In: Broaddus VC, Mason RJ, Ernst MD, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 16.
Kleigman RM, Stanton BF, St. Geme JW, Schor NF. Cyanotic congenital heart lesions: lesions associated with decreased pulmonary blood flow. In: Kliegman RM, Stanton BF, St Geme JW, Schor NF, eds. Nelson Textbook of Pediatrics. 20th ed. Philadelphia, PA: Elsevier; 2016:chap 430.