A 2004 study found that redheads are more sensitive to pain. Redheads need significantly in quotes more anesthesia than people with dark hair, but redheads need fewer opiates. But what if you don't have hair the color of a chestnut horse in the sunset? Well you could just be a highly sensitive person, which is not a disorder,. It's an attribute. And highly sensitive individuals up here in all kinds of species, from humans to fruit flies, scientists say. We're all unique little flowers.