Last Reviewed: 08 Jan 2026
There are many common signs and symptoms of eating disorders that might be observed by a classroom teacher. Eating disorders are serious, potentially life-threatening, mental illnesses. Research shows that early intervention and treatment can increase the speed of recovery. If you think a student has an eating disorder or has developed unhealthy behaviours or attitudes about body weight, shape or food, it is important to voice your concerns as soon as you can and refer them for further assessment and support.
Eating disorders are defined by changes in behaviours, thoughts and attitudes to food, eating, weight or body shape that interfere and detrimentally impact upon an individual’s life. Some changes you may notice in students are listed below:
Changes in weight i.e. rapid weight loss, persistent low weight, failure to meet normal growth targets, frequent weight changes (loss or gain)
Fainting or dizziness
Feeling cold most of the time, even in warm weather
Feeling bloated or constipated
Feeling tired and not sleeping very well
Lethargy or low energy
Signs of damage due to vomiting, including swelling around the cheeks or jaw, calluses on knuckles, damage to teeth and bad breath
Loss of or irregular menstruation in girls
Fine hair appearing on face and body
Swollen glands or bad breath may indicate self-induced vomiting
Increased focus or concerns with eating, food, body shape or weight
Feeling anxious and/or irritable around food and mealtimes
Feeling distressed, sad, anxious or guilty about what they have eaten
Expressing intense fear of gaining weight
Dissatisfaction with their body
Feelings of shame, self-loathing or guilt, particularly after eating
Significantly distorted view of what they look like
Increased difficulty concentrating
Sensitivity to comments relating to food, weight, body shape or exercise
Depression, anxiety or irritability
‘Black and white’ or rigid thinking
There may not (at least at first) be observable signs in some students who are experiencing an eating disorder. For example, often they may continue to do well in class and with their assessments despite their symptoms.
Frequent visits to the bathroom
Social withdrawal
No longer enjoying activities they previously enjoyed
Dieting behaviour such as counting calories, tracking food, and/or skipping meals
Repetitive or obsessive behaviours relating to body shape and weight such as frequently checking their reflection or pinching parts of their body
Compulsive or excessive exercising
Changes in attitude toward school and school performance
Self-harm, substance abuse or suicide attempts
As a classroom teacher you may not have the opportunity to directly observe your students eating and/or exercising however you may receive information from other sources (such as the student’s peers, family, other teachers or even the student themselves) that they are engaging in behaviours that are cause for concern such as:
Evidence of deliberate misuse of laxatives, appetite suppressants, enemas and diuretics
Evidence of eating large amounts of food such as lots of food wrappers
Secrecy around eating
Radical changes in food preferences
Preoccupation with preparing food for others, recipes and/or nutrition
Erratic behaviour, for example, stealing food or spending excessive amounts of money on food
Avoiding eating meals with others
Giving food away to others
Obsessive rituals around food preparation and eating
Elimination of entire food groups, for example, not eating carbohydrates
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