Dehydration is a very common condition that can easily occur in day-to-day life. Dehydration also commonly occurs from illnesses that affect the stomach due to diarrhea and vomiting, and can happen often for athletes with strenuous workout routines. Dehydration can cause a variety of symptoms depending on the severity, however, headaches are a common symptom of mild dehydration and a sign it’s time to drink some water. If you’re feeling unwell and are ...