I too had been affected by the Trigger Thumb after a year of taking Anastrozole the inflamation in the base tendons of the thumb (that is what is going on ) I have gone to a PT this wk for it and she gave me a plastic splint in the right diameter for my thumb, recommending to wear it part of the day . My thumb feels more mobile and I also had been massaging Castor oil on this thumb and also wear I have a BC tumor on my L5 vertabrae. Just an FYI--please look at the ingredients of Salonpas. It contains serveral? toxic chemicals so I would definitely reconsider that usage if you have B/C or could be prone to cancer.