When the head aches, all the members partake of the pain.
Tension headaches seem to be an equal-opportunity affliction.
Tension headaches can lead to irresponsible behavior, which can, actually, have a real practical value. This selfish behavior might lead you to rest and take care of your headache. Sometimes it seems that a headache is nature's way of getting you to relax. If, however, your teeth are clenched so tightly that people think you're doing a Clint Eastwood impersonation, if your neck is so tight that U.S. Steel wants to patent this musculature, and if your eyeballs hurt when you move them, then you are paying the price of not resting and enjoying yourself enough. You now have some catch-up to do.