Dear Lady,
Thanks for reposing your faith in us. I can fully understand your concern for your daughter's ailment(s).
Frankly speaking, I cannot comment upon the grounds on which repeated
endoscopy was performed and a diagnosis of
esophagitis made.
However, let us focus on the sequence of events : abrupt stomach pain -->
loss of consciousness --> transient loss of vision ---> stiffening of thighs, followed by perceived weakness in legs.
Such sequence of events can be seen in certain types of
Epilepsy. I will therefore recommend that you
consult a Neurologist who will order for EEG/CT scan of Brain to exclude/confirm Epilepsy. It may be a remote possibility, but should nevertheless, be kept in mind.
Further, similar episodes can also be seen in a relatively rare condition called Acute Intermittent Porphyrias. you may discuss the possibility with your Family Physician who will in turn, guide you how to go about ruling out this rare condition.
you are always welcome to seek further clarifications, if any.
Fond regards,
Dr. Karanwal