If you are a regular coffee drinker then you have probably experienced the headache that comes along with skipping that morning cup of Joe. 

We have known about this phenomenon for over 2 centuries, but only recently have we made progress in finding out exactly why this happens. 

Of course, as you may have guessed, it all has to do with brain chemistry, caffeine addiction and withdrawals. 

Watch the SciShow video below to hear all about the current research and discoveries into this annoying little problem. 

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