Does neurontin (gabapentin) treat face pain and headaches?

Yes: Neurontin (gabapentin) is a good choice to face pain and headaches. It depends on what the underlying reason is though for the pain and headaches.

Sometimes: Often headache and face pain are related to certain neurological condition. In thus case neurontil may be a good choice.

Can be, but: It can be, but you need a diagnosis first. See an oral surgeon or TMJ expert for diagnosis and treatment based on diagnosis.