What is the origin of the idiom "get in one's hair" and when to use it?

The exact origin of the phrase "get in one's hair" is unclear. However, it is believed to have originated in the early 19th century and may have emerged from the notion of literal hair being a nuisance when it falls onto or sticks to someone's face or body. This idiom is used in various contexts to describe situations or individuals that are consistently bothersome, irritating, or frustrating. It can be employed to express annoyance with persistent problems, repetitive annoyances, or people who are constantly interfering or causing trouble.