These spots can vary in color from yellowish-brown to black-brown. The shape and size can vary. Some people may notice irregular, blotchy patches, while others have brown lines. In this article ...

Poop’s brown color is mostly due to bile and bilirubin. Bile, which has a yellowish-green color, plays many roles in your digestion process. Your liver makes about 500 to 600 milliliters (17 to ...

The yellow core of your teeth becomes more visible. Brown. Tobacco, dark beverages like tea or coffee, and poor brushing habits that lead to tooth decay may cause teeth to turn brown. White.