Employee was raking coating from Kiln #6. EE used a long metal rake. EE shoulder felt sore, ee reported it to supervisor on 10/24/2017, but did not want to seek medical care. EE thought it was just sore, but wanted to let them know. On 10/25, ee requested to see a medical professional for evaluation. EE was seen on 10/25/2017, and was diagnosed with Rotator cuff tendonitis.