Hello,
Thank you for writing. If you have ECU tendonitis you should have the following symptoms:
Pain at the insertion of the tendon at the base of the pinky on the back of the hand... to touch.
Pain in the morning - stiffness and ache.
Sometimes clicking with rotation.
Pain with mousing, writing or typing.
Pain free weight bearing and grip.
Treatment: no stretch to the wrist into flexion (common night time position)
Wrist cock-up splint at night for the time it takes to become pain free at rest, pain free to touch and pain free with motion.
NO strengthening.
Direct ice 2 minutes throughout the day as much as you can tolerate.
I wonder how you developed this as there is a high correlation of TFCC involvement with ECU tendonitis.
The weight bearing test will tell the story. What are your numbers?
Extensor carpi ulnaris - Ganfyd
I hope that helps. Please let me know if I can answer any further questions.