Sometimes, you have to fight the urge to stop scratching before red streaks appear from your nails. But why does it feel so satisfying?
Scratching releases serotonin, which can temporarily intensify the itch. At the same time, it delivers a slight pain signal that distracts your brain from the original sensation.
This triggers even more serotonin—a natural painkiller and mood booster. The discomfort fades, replaced by a rush of pleasure that makes you want to keep going.
Read also: 10 ways to soothe itching
