hi, thanks for the question, Shoulder impingement syndrome
is something tht has been best treated conservatively than surgically. Anyways, Here surgery has been done which probably is either arthroscopic sub acromial decompression or partial removal of acromion if it is of ( type ii or type III i.e. curved or bent type ).
Here the possibility is tht either there has been only partial decompression or that the neuro bundle has not been released of compression.It looks like THORACIC OUTLET SYNDROME
. First line of management is EXERCISE, EXERCISE AND EXERCISE.