Acute pancreatitis typically manifests with a sudden onset of severe, band-like abdominal pain, often radiating to the back. This pain can intensify with coughing, strenuous movements, or deep breaths, while sitting upright and leaning forward may offer some relief.

Alongside the characteristic abdominal pain, patients frequently experience other symptoms, including nausea, vomiting, and an accelerated pulse rate. In some instances, particularly those related to alcohol consumption, severe pain might be the sole prominent symptom.

Other common indicators of acute pancreatitis include:
* Fever (above 38°C)
* Rapid breathing
* Difficulty with bowel movements
* Jaundice (yellowing of the eyes)
* Changes in stool color