frozen shoulder pain is most common anteriorly

hi can anyone tel me why the pain is most common and very severe on the anterior aspect only?
is that the ac joint or anterior capsule
the major question is the pain comes with both medial and lateral rotation and even with flexion and abduction movements
is it actually capsular or due to anything else?
guide me for this.......

In a true frozen shoulder there is very little flexion and abduction. So if your client has this then they do not have a frozen shoulder. Under arthroscopy the entire joint capsule looks read and inflamed. Not that the capsule of the shoulder joint has a significant amount of laxity and that is it not the capsule that holds the humeral head on the glenoid fossa. One need only look at a hemiplegic shoulder to see that. Other factors are in play here.

Most commonly people with suspected "frozen" shoulders are people with rotator cuff lesions. Those should be investigated and treated as appropriate.