Here is an abstract on HC - it stresses that it is an indomethacin-responsive headache disorder (Background) that resembles symptoms of both CH and Migraine (photophobia & phonophobia w/ nausea that aren't as common with CH).  


Hemicrania continua is not that rare
M. F. P. Peres, MD, S. D. Silberstein, MD FACP;, S. Nahmias, A. L. Shechter, BS, I. Youssef, MD, T. D. Rozen, MD and W. B. Young, MD

From the Jefferson Headache Center (Drs. Peres and Silberstein and A.L. Shechter) and the Department of Neurology (Drs. Rozen and Young and S. Nahmias), Thomas Jefferson University Hospital, Philadelphia, PA; and the Department of Neurology (Dr. Youssef), Temple University Hospital, Philadelphia, PA.

Background:— Hemicrania continua is an indomethacin-responsive headache disorder characterized by a continuous, moderate to severe, unilateral headache. More than 90 cases of hemicrania continua have been reported, but there is still uncertainty about its clinical features.

Methods:— The authors compared 34 new cases (24 women, 10 men) with previously reported cases. All the patients met Goadsby and Lipton’s proposed criteria. The authors compared baseline (continuous background headache) and exacerbation (attacks of severe periods of headaches).

Results:— The baseline headache was typically mild to moderate in intensity and usually not associated with severe disability. In contrast, the headache exacerbations were severe and associated with photophobia, phonophobia, nausea, and disability. At least one autonomic symptom was present in 25 patients (74%). Jabs and jolts were present in 14 patients (41%). The mean indomethacin dose was 136.7 ± 60 mg (range 25 to 225 mg). Twenty-four patients (70.6%) met International Headache Society criteria for migraine in their exacerbation period. Occipital tenderness was observed in 23 patients (67.6%). The temporal pattern was remitting in four patients (11.8%), continuous from onset in 18 (52.9%), and continuous evolving from remitting in 12 (35.3%).

Conclusion:— Hemicrania continua is not a rare disorder. All cases of chronic unilateral daily headaches should receive an indomethacin trial early if not first in treatment.
Neurology 2001;57:948-951
© 2001 American Academy of Neurology

Hi, Maria. Indomethacin seems to be used by Drs & neurologists as part of the elimination process - if it has no affect on your headaches, that eliminates hemicrania continua and paroxysmal hemicrania.  My understanding is that hemicrania continua doesn't have pain free times and can be made worse by moving your head, and paroxysmal hemicrania last a few minutes with pain free time in between but occurs very frequently.

Part of the elimination is also how long the headaches last.  C H last around 15 minutes to 3 hours.

There are many other short headaches in the category of Trigiminal Autonomous Cephalalgia.

Good luck.  If you have more than one kind of headache, it can take longer to sort out.

Charlotte