Jocilyn is 5 feet tall and weighs 87 pounds, yet when she looks in the mirror she thinks she is too fat. she does aerobics for two hours daily and eats very little. jocilyn appears to suffer from

Anorexia

Explanation:

Anorexia is a disorder in which people believe that they are fat and because of that they eat little and exercise a lot to try to lose weight even when they are really skinny. This disorder is really dangerous because people can get to a point in which they don't get enough nutrients and they can end having a heart attack, kidney problems and electrolyte imbalance. This can led to people dying if not treated. According to this, Jocilyn appears to suffer from anorexia.

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if someone had the list of traits you provided