Capsaicin
"Shingles 5 years ago , chronic PHN Trigeminal Upper Branch Nerve Pain Discomfort since , used Lidoderm Lidocaine patch , that lost it's ability to relieve , tried other topical creams Eucerin skin calming creme w/ drop of Geranium Oil mixed and worked into affected area , after awhile that lost it's ability as well .
Tonight tried Capzacin again , used years ago didn't do much , yet tonight it did , we'll see tomorrow ."