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 care for green vomit in an infant, severe abdominal pain, vomiting blood, black stools, fainting, breathing difficulty, or signs of severe dehydration.
Contact the treating team promptly for increasing pain, repeated vomiting, abdominal swelling, fever, jaundice, poor feeding, or reduced urination.
Follow-up after diagnosis depends on symptoms and age.
A person with an incidental finding may be advised to report persistent upper abdominal pain, repeated vomiting, unexplained weight loss, jaundice, or difficulty eating.
Routine repeat imaging is not automatically needed for everyone; the clinician may recommend it when symptoms or duct abnormalities require monitoring.
After surgery, follow-up visits assess feeding, hydration, bowel function, weight gain, and wound healing.
Infants and children may need growth and nutrition checks.
If another congenital condition was identified, follow-up may involve additional specialists.
Every sign above is quoted from the sofidex article on Annular pancreas. If you are not sure, err upward — it is always reasonable to be checked.