facts-i-just-made-up:

Aurumgingivosis or “Gold Gums” effects %0.000092 of the world population, mostly it appears in Ireland. The disease involves inflammation of the gums which also become saturated with gold particles and trace amounts of bronze.  The disease is untreatable and incurable but beyond minor discomfort an a startling appearance, it has no other symptoms and is not generally considered a major health issue.
It is contracted by blowing a leprechaun.

facts-i-just-made-up:

Aurumgingivosis or “Gold Gums” effects %0.000092 of the world population, mostly it appears in Ireland. The disease involves inflammation of the gums which also become saturated with gold particles and trace amounts of bronze.  The disease is untreatable and incurable but beyond minor discomfort an a startling appearance, it has no other symptoms and is not generally considered a major health issue.

It is contracted by blowing a leprechaun.