Jo Cameron gave birth to a child without needing pain killers, it "felt like a tickle". She has unintentionally injured herself due to not being able to feel the pain.
Scientists are also intrigued by Ms. Cameron’s extraordinarily low anxiety level. ... She cannot recall ever having felt depressed or scared.
In retrospect, she sees how her genetic disposition may have aided her at work. After years as a primary-school teacher, she retrained to work with people with severe mental disabilities. Erratic, aggressive behavior never riled her, she said.
But though having this mutation may sound like a dream, there are downsides. One is that she is quite forgetful; prone to losing her keys and her train of thought midsentence. The other is that she’s never felt the “adrenaline rush” that other people talk about, she said.