Drink as much water when you have headaches

Drinking water can help prevent and treat headaches

Dehydration can cause headaches and migraines in some.

Some studies have shown that water can relieve headaches in those who are dehydrated.

However, this seems to depend on the type of headaches.

A study of 18 people found that water had no effect on the frequency of headaches, but somewhat reduced intensity and duration.