Gel stain is a type of wood stain that comes in a gel form rather than a liquid. It's a popular choice for finishing wood surfaces and provides a rich, even color. Many home improvement pros and ...

Your doctor may use an acid-fast bacteria (AFB) stain test to see if you have a lung disease like tuberculosis (TB). In addition to showing tuberculosis, an AFB stain can also show if you have another ...

Corneal staining isn’t a disease, it’s a sign of abrasions to your cornea, the outer surface tissue of your eyes. Abrasions can have different causes, including wearing contact lenses or if something ...