Excessive thirst may be caused by a recent salty or spicy meal, diabetes melitus, diabetes insipidus, drugs like anticholinergics, diuretics, excessive blood loss, excess sweating, diarrhea or vomiting, fever, burns sepsis, heart liver or kidney failure,psychogenic polydipsia (mental illness).
Please consult a physician for further evaluation of this symptom.
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Please note that the information provided is not a substitute to medical advice