Argyria is caused by a buildup of silver in the body, which discolors the skin.

Oyster grey is the fresh, breezy ... more clues about vitiligo - a skin condition where patients develop white skin patches. Scientists have tried surgically placing hair follicles in the affected ...

Hyperpigmentation is an medical term for any darkening of the skin. Knowing which type you have can help you understand how to treat it.