<s>[INST] When visiting my children in Crested Butte CO. I get sick during the stay. I am 65 and have eosinophilia and some swallowing disorders occasionally. I do very well at home but could the high altitude be affecting my system there? It seems like some part of a 4-6 day stay I am ill with vomiting or dirahrea and have difficulty swallowing my vitamins . [/INST] Hi, Welcome to Chat Doctor. 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 food pipe. Esophageal manometry has to be done to rule this out. Since you have eosinophil also, eosinophilic esophagitis is another possibility (though it is more common in child Chat Doctor. Discuss with your doctor about these possibilities and the tests. </s>