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 severe pain, trouble breathing, fainting, confusion, vomiting blood, black stools, or signs of shock.
And for anyone, someone who:
After leaving the hospital, contact the treating team promptly for increasing pain, poor food or fluid intake, continued vomiting, fever, jaundice, worsening abdominal swelling, or unexplained weight loss.
And for anyone, someone who:
Follow-up may involve a primary care clinician, gastroenterologist, surgeon, dietitian, diabetes specialist, or alcohol-treatment service.
Routine follow-up may include review of pain, appetite, weight, bowel movements, glucose, triglycerides, liver tests, and planned imaging.
Take medicines only as directed.
If a gallbladder procedure or further pancreatic imaging is recommended, confirm when and where it will occur.
The article also says
Before discharge, ask what caused the episode, whether more testing is needed, and what steps may lower the chance of recurrence.
Avoid alcohol until the treating team says it is safe; people with alcohol-related pancreatitis are generally advised to stop completely.
Avoid smoking and ask for help quitting if needed.
Follow any individualized nutrition plan, but restrictive diets or supplements are not a substitute for treating the cause.
Every sign above is quoted from the sofidex article on Acute pancreatitis. If you are not sure, err upward — it is always reasonable to be checked.