i'm sorry your daughter went through this. i hope she has been successfully treated for her anorexia and bulimia. the symptoms you describe could be caused by many things and only a health care professional can tell for sure what caused this episode. however if indeed this was an isolated incident one likely cause of these symptoms is low blood sugar ( hypoglycemia ). if a person doesn't eat regularly or if they work too hard and neglect their health overall their blood sugar can drop and cause precisely the symptoms you describe. in a case like that giving sugar is the best remedy. crackers would do the trick because the carbohydrates would quickly be converted to simple sugars. if the crackers and water made your daughter feel better chances are good this was just an episode of hypoglycemia. your daughter can avoid future episodes by taking care of herself including eating quality foods on a regular schedule drinking plenty of water and exercising. with her history of anorexia and bulimia it's important she maintains healthy non-compulsive eating and exercise habits. if she needs help with this she should see a psychologist who specializes in eating disorders. often these services are available on a sliding fee scale. i want to emphasize i'm only speculating about one possible cause for your daughter's episode. getting to the root cause of what happened requires a physical exam and some blood testing. your daughter needs to find a way to obtain medical care not only because of what happened with the fainting but to help manage her health eating disorders anxiety and tobacco use. wishing you all well!
my daughter 25 had an episode of sweating dizzyness nausea fever numbness headache weakness and fainted. also. vision came and went lethargic&zoning out. she laid over commode to vomit (didn't) and was very hot. she has a history of episodes of anorexia/belemia. she also smokes occasionally and drinks alcohol . mostly lite beer. very depressed has anxiety and panic attacks. not seeing a dr. no insurance and no drug abuse history at all. she is 5'3" tall and weighs 100#. she was at work and her boss only offered water and crackers. i am concerned as is her husband that this may have been a. heart attack.