I've responded in a private message, but I'm sorry I don't have any suggestions to offer other than to see if there is a specialist you can go to (gastroenterologist?) who will be able to provide some insight. My heart is with you at how difficult this must be for you to not know how to help. I'm sorry if my initial response was a little insensitive.
I have already taken her to 'n' number of doctors in India but they dont seem to think about the condition and have even said that as a parent Im over-reacting! They are of the opinion that as long she is active, not complaining of fatigue she should be fine and that I should allow her to eat on her own in whatever quatities she's comfortable with. Its very frustrating that I cant get them to see that she hasnt gained any weight in the last 1 1/2 - 2 yrs(height wise she has grown a bit). She has been given syrups for enhancing appetite and digestion. Even chewable tablets for allergy- odimont-4. I havent seen any sort of positive effect/improvement.
She removes a lot of phlegm everyday and once she throws up she takes in food more willingly and faster. She is unable to swallow thick paste-like food/banana etc properly - its as if something is blocking the food near her throat. Initially she would throw up her syrup medicines too but I have now started diluting a bit with water and she's ok with that.
She drinks a lot of water/juices everyday and she seems to choke on them also almost everytime. I have to warn her each time to drink very slowly.
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If I give her food of different textures at the same meal - say bread and boiled egg ( together or one after the other) she's bound to vomit. The whole meal has to be of the same consistency/nature or there should be a slight time gap in between the food varieties.
Vomitings get worse in winter or if the AC is on. She also gets very itchy if it is even a little bit dusty.
I dont know how important/trivial these observations are but Im really concerned about her health and growth. I have had sleepless days and nights worrying about it.
I don't believe you are posting this question on a message board! First of all, it is highly unlikely a 3 year old has an eating disorder. Second of all daily vomiting and not eating are a serious medical problem and could quickly become a medical emergency if she becomes severely dehydrated. I would take her to her doctor right away and if he can't help her ask for a referral to an appropriate specialist. Your daughter needs medical attention yesterday!