There are some differences between eating disorders in children (younger than 12) and eating disorders in teenagers and adults.
Children are:
less likely to say that they are afraid of weight gain or being fat
less likely to make themselves vomit or use laxatives
less likely to understand that their condition is serious
more likely to have physical symptoms
less likely to have symptoms that fit the pattern of anorexia nervosa, bulimia nervosa or binge eating disorder, but more likely to have ARFID.
Risks of eating disorders in children
Malnutrition in children with eating disorders can slow down normal growth, delay puberty, and cause brain problems such as an inability to learn and think normally.
Girls may not start having their periods at the normal age. Children with eating disorders can also have psychological problems, such as depression, anxiety and obsessive-compulsive disorder.
Having an eating disorder in childhood increases a person’s chance of developing obesity, high blood pressure and heart disease in later life. Low bone density and osteoporosis (having porous, fragile bones that are prone to fractures) is a risk, especially for girls with anorexia nervosa who become malnourished in early adolescence and who don’t have normal periods.
Even if they recover from anorexia nervosa, they may not build up normal bone mass.