HOU Guoying, 65, of China, has a pain in her face. She has been complaining of an agonising headache. Guoying has a bullet embedded near her right jaw and ear, having been accidentally shot with a pistol during the Cultural Revolution in 1967. In 1978, an X-ray revealed the bullet in her head. She declined an opertion, fearing the poor medical facilties woudl get her before the bullet. Last month she has the 3.3cm-long bullet removed.