Thumb tendonitis is characterized by pain along the side of your hand going from the thumb joint towards the wrist. If you feel around, you may find a “ropy” cord (the tendon) that hurts, with the pain worsening when you push on it.
Pain relief herbals
Pain relief herbals that include willow bark, boswellia and cherry can help over 4-6 weeks (2 capsules 3 times a day till pain resolves, then as needed). Another excellent mix is a highly absorbed curcumin, boswellia, DLPA and natto. I would use the 2 herbal mixes together (1-2 tabs 3x day till the pain is resolved or 6 weeks, then as needed). If your doctor is willing, adding the pain gel below makes a powerful combination.
Compounded prescription pain gels/creams can work very well for this (physicians can call these in to ITC pharmacy at 888-349-5453 and should ask for the "topical pain mix"). Give it 6 weeks to work (it'll be faster than that). It is very safe and effective — and highly recommended for any tendonitis, and for localized pain in general. Steroid injections locally are also reasonable (not to be injected into the tendon).