RE: ARNICA, I VOTE "YES!"
My Favorite Formulation:
https://www.amazon.com/Penetrex-Pain.../dp/B0026HDURA
Penetrex may be found at: Amazon, at Walmart, at Penetrex.com
Money back guarantee.
I love this formulation. It does more as one keeps up with use. The relief is better in 3 days than in one day, for example.