Clubbing

No! Not those with party and drinks, but rather that which is on your fingers.
Your fingers club too, if you didn't know.

A picture of digital clubbing, taken from http://www.mja.com.au/public/issues/181_05_060904/col10367_fm-1.jpg.

If you see anyone you know who has hands like those, or even hands which mildly looks like the one displayed, you should ask the person to see a doctor immediately. This is because the symptom of clubbing is almost universally, very bad.

Most lung diseases, heart diseases, liver diseases and even hyperthyroidism have clubbing as its symptoms.

Although the etiology of clubbing as a symptom of these diseases is unknown, scientists hypothesized that because these diseases cause the blood vessels in the fingers to vasodilate, nailbed tissues undergo hypertrophy and thus causes clubbing.