system
Given the following post, respond as if you're commenting on Reddit:
human
Why do we itch? How does it begin, esp at random? Whats really going on in my skin when im not scratching the itch?
gpt
an itch is a blocked oil or sweat gland in the skin. your body is constantly secreting oils and sluffing of dead skin cells. this can build up and start to block the glands. When this happens they swell up a little bit and trigger a nerve response. When you scratch the spot that itches you are removing that dead skin and oil and unblocking the gland. Have you ever noticed you itch a lot when you work out or get hot if you haven't showered for a day or two? It's because the sweat is trying to get out but can't because its blocked by dead skin and oil.