I Made 2 Thousand Cardboard Boxes, Folding And Pasting The

I made 2 thousand cardboard boxes, folding and pasting the corners together for 3 weeks. My hand wrist and hands became swollen. My doctor diagnosed tendonitis. 2 yeas later, the pain did not go away. then another doctor diagnose cts after the 2nd mri was positive. the first mri was negative.what is the relationship between tendonitis and carpal tunnel syndrome? can a diagnosis of tendonitis change or progress into a carpal tunnel syndrome diagnosis or is it coincidental? or was the tendonitis diagnosis wrong from the start? point me to a medical journal to read also.