How can one treat nerve pain?

depends on cause: Treatment depends on the cause of the nerve problem and how long standing it is as well as your age and health. Also the severity of the nerve injury plays a role. Is the nerve problem related to a nerve compression inside or outside of the spine or due to issues related to diabetes, vitamin deficiencies, toxic exposure, etc. Or both. A diagnosis needs to be made first.

Conservatively: With musculo-skeletal pain treat with pt and home exercise. Medications for nerve pain can be used but cause side effects. Consider topical compounding ointment, followed by non-opiate meds. Anti-seizure meds like neuron tin, tricyclic antidepressants, snri antidepressants like Cymbalta (duloxetine) have been effective. Nerve blocks, neuroablation, spinal cord or peripheral nerve stimulators can be effective.