Headache on one side of head could it mean i have GCA?

20 months into PMR woke with severe headache last night  increased Pred from 5.5  to 10 mg. This decreased the pain but myhead stll hurts. Could it be GCA if that is the only symptom?...or is it just another PMR symptom????

It is possible and really is something to report to your doctor. Severe headache is not a typical symptom of PMR - unless the PMR is being a symptom of GCA, which it can be. If you have any other symptoms don't hesitate to speak to a doctor asap - emergency services if necessary.

Misha, contact your doctor ASP, it may be nothing but why take chances.

Good luck. 🙂

If you didn't already have the PMR diagnosis it would be tempting to dismiss it as something else.  New onset of migraines, if you haven't previously had them, dehydration, sinus, tension (sleeping in an awkward position can stress the neck and cause headache and yyou might never know).  But given your current diagnosis, definitely worth mentioning to the doctor, and as Eileen says going to emergency if your symptoms worsen or change, especially if your vision is involved.  It's also interesting that the pred appeared to help the pain, but it's also possible it eased anyway when you got up and drank some fluids.  

Talk to your doctor right away.  A severe headache on one side was definitely my major symptom of GCA along with eye pain. 

You meant this reply for MIsha.