What is the origin of the idiom "cold comfort" and when to use it?

The idiom "cold comfort" refers to a situation where something may provide a small amount of relief or consolation but ultimately fails to offer true comfort or solace. It describes a situation where the consolation or reassurance provided is insufficient to alleviate the distress or disappointment being experienced. It describes a situation where the consolation or reassurance provided is insufficient to alleviate the distress or disappointment being experienced.