Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for chest pain, severe difficulty breathing, fainting, uncontrolled bleeding, or an arm that becomes suddenly cold, pale, or blue.
Seek prompt medical advice for increasing redness or swelling, wound drainage, fever at or above the level given in your discharge instructions, pain that is rapidly worsening, or new numbness or weakness after the nerve block should have worn off.
Get urgent assessment after a fall or if the shoulder suddenly changes shape, becomes unstable, or you can no longer move it as expected.
For routine questions, contact the team during normal hours about medication side effects, sling use, exercises, wound care, or a recovery that is not progressing as expected.
Every sign above is quoted from the sofidex article on Shoulder replacement. If you are not sure, err upward — it is always reasonable to be checked.