Pancreatitis is inflammation of the pancreas. Inflammation is immune system activity that can cause swelling, pain, and changes in how an organ or tissues work.

The pancreas is a long, flat gland that's tucked behind the stomach. The pancreas helps the body digest food and regulates blood sugars.

Pancreatitis can be an acute condition. This means it appears suddenly and generally lasts a short time. Chronic pancreatitis is a long-term condition. The damage to the pancreas can get worse over time.

Acute pancreatitis may improve on its own. More-serious disease requires treatment in a hospital and can cause life-threatening complications.

Symptoms

Symptoms of pancreatitis may vary. Acute pancreatitis symptoms may include:

Pain in the upper belly.

Pain in the upper belly that radiates to the back.

Tenderness when touching the belly.

Fever.

Rapid pulse.

Upset stomach

Vomiting.