Hello there,,,,,well 4 years is a long time for any tendinopathy/tendinitis to give problems...at the max the problem should be resolved in 6 months to 9 months...it means you are not on the right rehabilitation path or you are not following instructions of your ortho/physio or straining your shoulder.
Next Steps
history regarding the pain,which movenmts cause it,
does it pain in the night?,,,needs to be known.
Health Tips
pain and swelling reduction,
increase in range of motion
strengthing and stretching
protocol is needed for complete cure.
electro modalities like US n TENS helps in pain relief n healing.
there are many brands of gel available in market but the proper one should be selected.
do reply back for a tailor made programme.
regards & take care.