An area of discoloration or darkening caused by chemical reactions or spilled liquids. Usually occurs on fabrics (ex: [[stained clothes]], [[bed sheet]], etc.) but can also occur on paper (ex: coffee stain), metals (rust), and more.

h4. See Also
* [[blood stain]]
* [[pussy juice stain]] (note [[wet clothes]] technically aren’t stains)
* [[sweaty clothes]]
染み シミ