<span>she damaged her peripheral nervous system bc taste cant really be transmitted back to her brain I guess</span>
Psychoanalysis is the answer as Sigmund Freud is known in his profession as a psychiatrist which used psychoanalysis to help people with mental disorders back in the day before any drugs were introduced to the market and healthcare system for people with mental illnesses.
Genetics play a role in eating disorders sometimes. If a person has an eating disorder it could be because of genetics. I would say it's a 50/50.
A death in the family can cause people to get depressed and turn to habits they don’t generally abuse such as drinking to much this in turn can make it so people get addicted to things like alcohol