My surgery was a number of years ago so hard to recall timelines. After surgery I experienced a fair bit of nerve pain under the arm (felt like blistering) and although vigilant with exercise, there was persistent tightness. Upon my checkup, my surgeon told me it was cording and sent me off to a specialist massage/laser therapy clinic. Sometimes this will resolve with one treatment, sometimes not. Mine was the type that was persistent and came and went to some degree for about 18 months but I've not had a recurrence since.
