It could be harmless conditions like muscle spasms or more serious but not life threatening problems like disc problems in the neck. There are some other causes so you should see your doctor.
If you are older and start to have vision changes you should go to the emergency room immediately.
That depends entirely on the type of headache being experienced.
If you have a headache for more than 2 to 3 days, that's not a headache anymore. That's a migraine.
usally you get a headache
Upset stomach, headache, and diarrhea.
Same sort of stuff that happens everywhere else
You would have a headache.
Your arteries will expand and you may get a headache
You could get a headache
When there is an eclipse especially solar it always happens to me Also geomagnetic storm can cause such headache
What happens is that you will be cranky, have bags under your eyes, and a headache.
i imagine it would get sick
You'll get a headache ?