Can Dehydration Trigger a Migraine?

Dehydration is one of several triggers that can exacerbate migraine headaches, including migraine variants like the one you are experiencing. 

Maintaining good hydration should help reduce the frequency of these visual migraines, which are also known as acephalgic migraine. 

If you continue to experience these events despite adequate hydration, there may be other factors or triggers that are playing a role, and keeping a migraine diary may help identify these issues. You can share that migraine diary with your physician if the problem continues.