It might not be a scaphoid pain. Instead, DeQuervains tenosynovitis( inflammation of tendons inserting in the thumb) is a likely possibility. You can use thumb splints which are readily available. Also, you can use hot packs over the area. Some ultrasound therapy might also help.

Hi you are having pain on activities involving palmar flexion  probably you have bilateral carpal tunnel syndrome which is a condition where one of your forearm nerves get compressed due to tightness through a passage called the carpal tunnel in your wrist. The above mentioned activities further reduce the space and hence you are having pain