My daughter has suffered for 3 months now from bilateral face pain, headaches nausea weakness & lethargy.The pain has prevented her from eating tho the mechanism of chewing is not the issue.Multiple investigations have ruled out infection,inflammation & dental causes.Neurology conclusion - face pain of unknown origin with some trigeminal neuralgia aspects. She is 19 years old & the pain is bilateral.She is on multiple medications including Endep (has eased the headaches) tegretol,oxycontin, codeine forte. She has just ceased lyrica that had no effect and has been on prednisone for last 3 days but is now reducing off it. The day after taking the prednisone she was back to normal & painfree.The doctors won't keep her on it. Without it she is bedridden and in enormous pain. Can anyone help