Lifestyle

Pancreatitis Often Starts With Upper Belly Pain That Spreads to the Back. Signs That Need Prompt Care

By Erica Coleman · October 27, 2026

Upper belly pain is easy to blame on a heavy meal or indigestion. When it lingers, grows stronger or reaches around to the back, it can point to a problem with the pancreas.

According to the National Institute of Diabetes and Digestive and Kidney Diseases, the main symptom of both acute and chronic pancreatitis is pain in the upper abdomen that may spread to the back. The institute says people with acute pancreatitis usually look and feel seriously ill and need to see a doctor right away.

Pancreatitis is inflammation of the pancreas, Mayo Clinic explains. The pancreas is a long, flat gland tucked behind the stomach that helps the body digest food and regulates blood sugar. The NIDDK says the condition occurs when the digestive enzymes the pancreas makes damage the organ itself. It can be acute, appearing suddenly, or chronic, a long-lasting form that gets worse over time.

These are the signs listed by the NIDDK, Mayo Clinic and MedlinePlus, a National Library of Medicine site.

Pain in the upper belly. The NIDDK says acute pancreatitis pain may begin slowly or suddenly, can be mild or severe and may last for several days. MedlinePlus describes pain in the upper left side or middle of the abdomen that becomes constant and more severe.

Pain that reaches the back or shoulder. Mayo Clinic lists upper belly pain that radiates to the back or shoulders. MedlinePlus says the pain may spread to the back or below the left shoulder blade.

Pain that is worse after eating or lying flat. Mayo Clinic lists pain that may feel worse after eating. MedlinePlus says the pain may get worse within minutes after eating or drinking, more commonly after foods high in fat, and may be worse when lying flat on the back.

Nausea, vomiting and fever. All three sources list nausea, vomiting and fever. MedlinePlus adds sweating.

A fast heartbeat and a tender belly. The NIDDK lists a fast heartbeat and a swollen or tender abdomen.

Yellowing skin or eyes. The NIDDK lists jaundice, a yellowish color of the skin or the whites of the eyes, among signs of severe pancreatitis. MedlinePlus lists mild yellowing along with clay-colored stools.

Weight loss and greasy stools. With chronic pancreatitis, Mayo Clinic lists losing weight without trying, diarrhea and oily, smelly stools. The NIDDK notes that some people with chronic pancreatitis have no symptoms until complications develop.

The most common cause of acute pancreatitis is gallstones, according to the NIDDK. Stones can get stuck in a bile or pancreatic duct as they pass through. The institute lists heavy alcohol use, genetic disorders of the pancreas and some medicines among the other most common causes. Mayo Clinic adds high triglyceride levels, high calcium levels and cigarette smoking, and says people who smoke are three times more likely to develop pancreatitis than people who don’t.

The NIDDK says to seek care right away for abdominal pain that is severe or getting worse, nausea and vomiting, fever or chills, a fast heartbeat, shortness of breath or jaundice, and warns that left untreated these problems can be fatal. Mayo Clinic advises getting immediate help if the pain is so severe you can’t sit still or find a comfortable position, and making an appointment for belly pain that doesn’t improve.

Doctors may check the blood for high levels of the enzymes amylase and lipase and use imaging such as ultrasound or a CT scan, according to the NIDDK. Because some medicines raise the risk, Mayo Clinic suggests talking with a health care professional about the medicines you take.

This article is for general information and is not medical advice. Talk with your doctor about any symptoms, and get emergency care for severe belly pain. This article was produced with the assistance of AI and fact-checked against the sources cited by LightWave Reports.