Here's the rub on painkilling creams.
D000287:Administration, Topical; D018712:Analgesics, Non-Narcotic / Q000008:administration & dosage*; D002211:Capsaicin / Q000008:administration & dosage*; D006801:Humans; D009824:Ointments / Q000008:administration & dosage; D010146:Pain / Q000188:drug therapy*; D012459:Salicylates / Q000008:administration & dosage*
D018712:Analgesics, Non-Narcotic; D009824:Ointments; D012459:Salicylates; D002211:Capsaicin