Answer:
A low body mass index for one's age and height.
Amenorrhea, a symptom that occurs after prolonged weight loss; causing menstruation to stop, hair to become brittle, and skin to become yellow and unhealthy.
Fear of even the slightest weight gain; taking all precautionary measures to avoid weight gain or becoming "overweight".
Rapid, continuous weight loss.
Lanugo: soft, fine hair growing over the face and body.
An obsession with counting calories and monitoring fat contents of food.
Preoccupation with food, recipes, or cooking; may cook elaborate dinners for others, but not eat the food themselves or consume a very small portion.
Food restrictions despite being underweight or at a healthy weight.
Food rituals, such as cutting food into tiny pieces, refusing to eat around others and hiding or discarding of food.
Purging: May use laxatives, diet pills, ipecac syrup, or water pills to flush food out of their system after eating or may engage in self-induced vomiting though this is a more common symptom of bulimia.
Excessive exercise including micro-exercising, for example making small persistent movements of fingers or toes.
Perception of self as overweight, in contradiction to an underweight reality.
Intolerance to cold and frequent complaints of being cold; body temperature may lower (hypothermia) in an effort to conserve energy due to malnutrition.
Hypotension or orthostatic hypotension.
Bradycardia or tachycardia.
Depression, anxiety disorders and insomnia.
Solitude: may avoid friends and family and become more withdrawn and secretive.
Abdominal distension.
Halitosis (from vomiting or starvation-induced ketosis).
Dry hair and skin, as well as hair thinning.
Chronic fatigue.
Rapid mood swings.
Having feet discoloration causing an orange appearance.
Having severe muscle tension, aches and pains.
Evidence/habits of self harming or self-loathing.
Admiration of thinner people.
Infertility.
Step-by-step explanation: