None. Neuropathic pain medication is not available over the counter, you will need a physicians prescription.
Have it evaluated. If the symptoms are due to neuropathy, topical capsaicin may be helpful for some, while others may benefit with oral medications. Watch you sugar intake, and have your vitamin b levels checked and supplemented as necessary. Consult with your physician for an appropriate plan of care.
None. There really are no otc medications for neuropathic pain.