Where does it hurt? Your head Why? You wake up on Saturday morning with a pounding headache. Cruel! A couple of things can cause weekend headaches. One is sleeping late. If you’re a first-thing-in-the-morning coffee drinker and you sleep in, you delay that caffeine fix and invite a withdrawal headache. Or it may be that you’ve thrown off your body rhythm. People who are prone to migraines are especially sensitive to changes in body rhythms, so getting too much sleep may be a migraine trigger for them. How to avoid it? Caffeine withdrawal headaches can be avoided by simply sticking with the same morning routine on weekends as weekdays. If you’re a migraine sufferer, try to go to sleep and wake up around the same time seven days a week.