For instance, drinking too much water can actually cause dry mouth/extreme thirst (as noted in the article), which will, in turn, cause us to drink more, causing more
frequent urination... BUT extreme thirst (and in turn,
frequent urination) is a prime symptom of dangerously high blood sugar levels, which can cause coma and death, if not treated immediately. One should NEVER make the assumption that extreme thirst is either over or dehydration, since it may likely be neither.