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Since you have swallowing difficulty, you need evaluation with an upper GI endoscopy
as the reason could be an obstruction due to growth in the food pipe.
Sometimes it may be due to motility disorder
which affects the contraction of the foodpipe. Esophageal manometry has to be done to rule this out.
Since you have eosinophila also, eosinophilic esophagitis
is another possibility ( though it is more common in children).
Discuss with your doctor about these possibilities and the tests.