Yes, dehydration can cause headaches. Dehydration is the loss of
water and electrolytes, such as sodium, chloride and potassium,
which are necessary for the body to function. The main cause of
dehydration is not drinking enough water to maintain healthy
levels. A variety of unpleasant symptoms occur when this
happens, including headaches. Severe dehydration is serious and
potentially life threatening.What are the Symptoms of
Dehydration? The initial symptoms of dehydration include thirst
and minor discomfort. Symptoms can progress to headache,
fatigue, weakness, constipation, parched lips, dizziness, dry or
flushed skin, rapid heartbeat and muscle cramps. Typically,
there's a decrease in urine output and the urine is dark or
amber in color. More severe signs are low blood pressure,
swelling of the tongue, and unconsciousness and death in the
most extreme cases.What Does a Dehydration Headache Feel Like?
Writing on this subject for Intelihealth.com, Howard LeWine, MD,
a clinical instructor of medicine at Harva