EMPLOYEE WAS WORKING ON ROCK BAGGING LINE PALLETIZING 80# X-COARSE FILM BAGS WHEN HE NOTICED PAIN IN THE LEFT SHOULDER BLADE AREA. NO SHARP PAIN, JUST GRADUALLY GETTING WORSE. EMPLOYEE ALSO PA LLETIZED 50# BAGS AND CONTINUED TO FEEL THE PAIN IN THE SHOULDER AREA AFTER WHICH HE REPORTED IT TO THE FOREMAN.