Restriction of shoulder range of motion can be caused by excessive scar tissue formation at the incision. When the body creates too much scar it can stick and bind to other soft tissue such as muscle, skin, and tendons. This stops how much the shoulder can move and restricts shoulder mobility.
Lymph (scar tissue) can form within lymph vessel, and cording can occur due to excessive scar tissue in the lymph vessel. This will also contribute to restriction in shoulder mobility
Physiotherapy treatment includes scar mobilization, manual therapy stretching, range of motion exercise, and self stretches for increasing flexibility, restoring mobility, and preventing further restrictions.