<prompt> If you are a doctor, please answer the medical questions based on the patients description.My left thumb will not bend when i want it to and if something moves it, it locks an is painful. It is also tender, and swollen, It is not the palm part of my thumb, although it hurts slightly. The pain radiates from the midjoint down the into the palm and up into the next finger? Any ideas?  <response>: Hello, It looks from your details that you may be suffering from steno sing type of tenosynovitis of your thumb. In other words, we also call it trigger thumb. You should do following to have relief in this:- Take a good anti-inflammatory analgesic like aceclofenc on your doctor prescription.- Keep your thumb in rest-Apply arm fomentation over it for 3 times a day-Do it for about 7-10 days this does not help then ask from your doctor about local application of steroid injection. Hope I have answered your question. Let me know if I can assist you further. 