Eosinophilia can occur due to allergies, parasitic infection, medication side-effects, and some other conditions. Any of these conditions can increase thirst. Did they check your electrolytes (potassium, sodium, etc.)? Any abnormalities there? Any recent medication and/or supplement changes?
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Anemia, Lymphopenia, intermittant Pancytopenia, chronic malabsorption/malnutrition, etc.; G Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), IV Cipro (for G-tube site infection).