You will notice an immediate change in the movement of your shoulder following replacement surgery. It will move more freely and smoothly. However, in the weeks following the surgery, you may experience serious pain and discomfort. After about two weeks, the pain should begin steadily decreasing. It is important to be cautious during this time. Don’t rush to get back to the regular swing of things. You may need to alter your routine to accommodate your healing shoulder. Avoid picking up heavy objects or positioning your arm in an unnatural way. For the majority of your recovery, your arm will remain inside the sling and you shouldn’t attempt to do anything that requires taking your arm out of it.  It may be anywhere between four to six weeks before you can pick up objects heavier than a glass of water or get behind the wheel of a vehicle. In the meantime, you should complete physical therapy and at-home exercises to ensure your shoulder heals quickly and correctly.