Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Emergency care is appropriate for uncontrolled bleeding, inability to pass urine with increasing discomfort, severe tissue discoloration, or signs of a serious allergic reaction.
Same-day medical advice is appropriate for increasing redness, pus-like drainage, worsening pain, fever, reduced urination, or a device that does not separate within the period given by the clinician.
Persistent bleeding or a trapped, very swollen foreskin also needs urgent assessment.
Routine follow-up depends on age, technique, and local practice.
Some newborns are reviewed during their usual post-birth care, while others need a specific wound check.
Older children and adults are more likely to have a planned surgical follow-up.
The article also says
Contact the care team routinely if healing is slower than expected, stitches do not dissolve as described, the result is concerning, or pain and swelling are not steadily improving.
Ask before applying powders, antiseptics, herbal products, or nonprescribed creams to the wound.
Every sign above is quoted from the sofidex article on Circumcision. If you are not sure, err upward — it is always reasonable to be checked.