Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency medical help for trouble breathing, chest pain, coughing up blood, fainting, or sudden severe weakness.
Also seek immediate help if your foot becomes cold or pale, or you develop a sudden major loss of feeling or movement.
Contact your surgical team promptly if you have increasing redness, warmth, drainage, fever, worsening swelling, pain that is not controlled as expected, persistent vomiting, or bleeding that soaks through the dressing.
New calf pain or one-sided calf swelling also needs urgent assessment.
Mild bruising, swelling, and soreness are usually discussed at routine follow-up if they are steadily improving.
Use the contact instructions provided by your facility if you are unsure whether a change is expected.
Every sign above is quoted from the sofidex article on Knee arthroscopy. If you are not sure, err upward — it is always reasonable to be checked.