Mental-health problems are often triggered by adverse events and eating disorders are no exception. The effects of sexual and physical abuse in causing eating disorders have been studied but a team of researchers in Israel looked into the effects of surgery and parental separation on people's eating patterns. They followed 2,206 children through secondary school for four years and found that parental separation, oral surgery and cosmetic surgery were all significantly correlated with eating disorder symptomology. The researchers speculated that oral surgery could make the mouth associated with trauma while the cosmetic surgery could increase the youngsters' awareness of their bodily appearance thus leading on to eating problems.
Bachar, Eyten ... [et al] - Surgery and parental separation as potential risk factors for abnormal eating attitudes - longitudinal study European Eating Disorders Review November-December 2008, 16(6), 442-450