What Causes Headache On Right Side Of Skull While Having High Cholesterol/neutrophils?

My daughter 18year old daughter has been suffering severe headaches for the past year. Her headache is localised on the right side of her skull. It's there all the time but the intensity changes. We cannot identify any triggers. She's always fatigued, has pain in her legs, high cholesterol, neutropenia, cysts on her ovaries. She had chiari decompression surgery 2010 & for two years she was symptom free. Neurologist don't know what's wrong with her and we've tried all pain therapy from octipital nerve blocks to lidocaine infusion, including pain killers and anti depressants . All her blood work is normal with exception of cholesterol and neutrophils. Any ideas? Thanks