I had a cyst removed from my right thumb joint 2.5 years ago and it healed with no issues. I did office work at that time. After getting laid off about 7 months ago, I decided to work part-time in retail clothing as cashier where we had to remove sensors. I had a tough time figuring out how to use these devices. Many times it took 2 to 5 attempts to finally get a sensor off. After 3 weeks I felt pain in my right thumb and it tended to radiate down my palm and through my wrist and down my forearm. Would it be the surgery that caused the tendinitis or the repetitive motions using the sensor?
Hello! Welcome to Chat Doctor ! First it won't be caused because of surgery since you had it 2.5 yrs back and yes it might be because of using sensor. Make sure to consult surgeon once. See if there is any other issues too.  Hope this clarifies your concerns. Thank you for the query. Take care