What is the origin of the idiom "scratch the itch" and when to use it?

The origin of the idiom "scratch the itch" is based on the literal act of scratching an itch on one's body to relieve the sensation of irritation or discomfort. It metaphorically represents taking action to satisfy a strong desire, address a need, or resolve a problem. This idiom is commonly used to convey the idea of fulfilling a longing or satisfying a craving. The phrase implies a proactive approach and a willingness to take action in order to achieve a desired outcome.