What are the symptoms of an eating disorder?

for anorexia:
Extreme weight loss
Body mass index less than 17.5 in adults, or 85% of expected weight in children
Stunted growth
Endocrine disorder, leading to cessation of periods in girls (amenorrhoea)
Decreased libido; impotence in males
Starvation symptoms, such as reduced metabolism, slow heart rate (bradycardia), hypotension, hypothermia and anemia
Abnormalities of mineral and electrolyte levels in the body
Thinning of the hair
Growth of lanugo hair over the body
Constantly feeling cold
Zinc deficiency
Reduction in white blood cell count
Reduced immune system function
Pallid complexion and sunken eyes
Creaking joints and bones
Collection of fluid in ankles during the day and around eyes during the night
Tooth decay
Constipation
Dry skin
Dry or chapped lips
Poor circulation, resulting in common attacks of 'pins and needles' and purple extremities
In cases of extreme weight loss, there can be nerve deterioration, leading to difficulty in moving the feet
Headaches
Brittle fingernails
Bruising easily
Distorted body image
Poor insight
Self-evaluation largely, or even exclusively, in terms of their shape and weight
Pre-occupation or obsessive thoughts about food and weight
Perfectionism
Obsessive compulsive disorder (OCD)
Belief that control over food/body is synonymous with being in control of one's life
Refusal to accept that one's weight is dangerously low even when it could be deadly
Refusal to accept that one's weight is normal, or healthy
Low self-esteem and self-efficacy
Intense fear about becoming overweight
Clinical depression or chronically low mood
Mood swings
Withdrawal from previous friendships and other peer-relationships
Deterioration in relationships with the family
Denial of basic needs, such as food and sleep
Influence from celebrities
Excessive exercise, food restriction
Secretive about eating or exercise behavior
Fainting
Self-harm, substance abuse or suicide attempts
Very sensitive to references about body weight
Aggressive when forced to eat "forbidden" foods


For Bulimia:
Recurrent episodes of binge eating. An episode of binge eating is characterized by both of the following:
Eating, in a fixed period of time, an amount of food that is definitely larger than most people would eat under similar circumstances.
A lack of control over eating during the episode: a feeling that one cannot stop eating or control what or how much one is eating.
Recurrent inappropriate compensatory behavior to prevent weight gain, such as: self-induced vomiting; misuse of laxatives, diuretics, or other medications; fasting; excessive exercise.
Self-evaluation is unduly influenced by body shape and weight.
The disturbance does not occur exclusively during episodes of anorexia nervosa.

For Binge Eating Disorder:
Periodically does not exercise control over consumption of food
Eats an unusually large amount of food at one time -- more than a normal person would eat in the same amount of time.
Eats much more quickly during binge episodes than during normal eating episodes
Eats until physically uncomfortable
Eats large amounts of food even when they are not really hungry
Usually eats alone during binge eating episodes, in order to avoid discovery of the disorder
Often eats alone during periods of normal eating, owing to feelings of embarrassment about food
Feels disgusted, depressed, or guilty after binge eating


These are the three most common eating disorders. There are others. Hope this helps

Lose off weight
pale skin
depression
playing with food instead of eating it
eating very little amounts
or binge eating then throwing up afterwards
can cause dry skins from lack of food

Drastic loss of weight