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 shortness of breath, coughing up blood, fainting, or another rapidly worsening medical emergency.
Contact your surgical team promptly if you have increasing redness, warmth, drainage, wound opening, fever, or pain that is getting worse rather than improving.
Seek urgent advice if the toe becomes pale, blue, unusually cold, or increasingly numb, or if the dressing feels dangerously tight.
Also seek urgent assessment for new calf pain or one-sided leg swelling.
Routine swelling, bruising, mild tenderness, and gradual changes in toe position should be discussed at your scheduled follow-up unless they suddenly worsen.
Every sign above is quoted from the sofidex article on Hammer toe repair. If you are not sure, err upward — it is always reasonable to be checked.