Possibilites ; ....Rotator cuff tears, Tendonitis inflamation, thats why Ibruprofen worked, are some of the most common shoulder complaints, I have the same problems , most annoying when trying to sleep, compressing, laying on the shoulder.....I have tried all sorts of Physio but nothing works long term,... BUT... exercises for the above complaints can be found on You Tube, & if you persist at them, they do work, at least giving some pain relief.. OR go see an Orthopedic Doctor with Shoulder Specialality, they have 1 in Pattaya....