Mrs North suffers from cluster ehadaches, though without the watery/droopy eye bit
Daresay she already knows this, but just in case
Sumitriptan is very effective for relieving migraines and fortunately cluster headache too
If you suffer frequently the nasal spray works quicker than tablets
I also have it to self-inject from an epi-pen type device which is the fastest way to get it in the system
If you get a bad bout a short high dose course of steroids works too, 60mg prednisolone a day for five days
Loads of possible preventative cures, these are usually very powerful drugs with side effects such as Lithium
One I had some success with was Gabapentin, worth a try because it seems to have less unpleasant side effects than most
Hope she doesn't suffer too much with them and give her some sympathy, very nasty condition and you wouldn't believe how much they hurt