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
Same sort of stuff that happens everywhere else
You could get a headache
You would have a headache.
When there is an eclipse especially solar it always happens to me Also geomagnetic storm can cause such headache
i imagine it would get sick
It could cause a headache.
You'll get a headache ?
You die.
well first you spell cruelty with an "E" and second yes it happens everywhere