I think she needs to see a neurologist who specializes in headaches/migraines. Make sure before the appointment that she writes all symptoms down and tell the dr all about the unconscious episode, never ending headache, and her reaction to anesthesia. It may help to keep a trigger journal. She may have other triggers.
My neurologist told me to not treat headaches with Tylenol because Tylenol can cause rebound headaches. So if she's treating with Tylenol that could be a cause. I hope that helps you some. A specialist is really what she needs.
Nail patella syndrome, osteoarthritis, complex migraines, eosinophilic esophagitis, major depressive disorder, OCD, and fibromyalgia, IBS
Meds: flovent 220 mcg, flexeril 10 mg, zonisanide 100 mg, omeprazole 40 mg, Cymbalta 60 mg,dicyclomine 20 mg, elavil, 10 mg, Xanax prn, hydrocodone prn.