A 47-year-old female patient has suffered from facial paralysis. She has pain in the forehead region, above eyebrows and on the side of the nose, which continues throughout the daytime and becomes severe in the evening.

The patient was prescribed with prednisolone (10 mg), alpha-lipoic acid, folic acid, methylcobalamin along with gabapentin and domperidone. What can be the further treatment for this differential pain?