6. The Weekend
Yeah, it sucks to think that you may wake up on Saturday or Sunday morning with a headache just because it’s the weekend. That really isn’t the reason, and it’s more likely to be caused by what you did not do on the weekend that you normally do during the week. A headache is a very common symptom of caffeine withdrawal, and instead of hitting the coffee shop at 7:00 am like you normally do every day on the way to work, on the weekend you may have slept in and missed your usual dose of morning caffeine.