What is the origin of the idiom "goose bumps" and when to use it?

The origin of the phrase "goose bumps" can be traced back to the physical appearance of the skin when it becomes raised and bumpy. The term "goose bumps" itself has been in use since the early 19th century. It is believed to have derived from the resemblance of the raised skin to the plucked skin of a goose, which has small bumps or protrusions. This phrase is used when discussing the physiological response to specific things, such as cold temperatures, intense emotions, or moments of fear or excitement.