Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
If you cannot reach the surgical team and circulation appears reduced, go to an emergency department.
Call emergency services for severe breathing difficulty, collapse, or another life-threatening reaction.
Contact the surgical team promptly if pain is getting worse rather than better, the cast becomes wet or damaged, or there is increasing redness, swelling, drainage, bad smell, or fever.
Also call if the dressing slips or the skin graft donor site begins bleeding.
Seek urgent medical assessment if a separated finger or toe becomes pale, blue, unusually dark, cold, very swollen, or increasingly numb.
Severe pain that does not improve with the recommended medicine can also signal pressure under a cast or a circulation problem.
Questions about scar care, activity, school, work, or routine dressing changes can usually wait for normal clinic hours unless the team has advised otherwise.
Every sign above is quoted from the sofidex article on Repair of webbed fingers or toes. If you are not sure, err upward — it is always reasonable to be checked.