3.Gallstones
These are hardened chunks of bile, a fluid that helps your body get rid of waste. They get stuck on the way out of your gallbladder, a small organ below your liver. They can range in size from a grain of sand to a golf ball and can cause severe pain in your upper belly or behind your belly button. You’re more likely to get them if you’re obese, have diabetes or Crohn’s disease, or don’t exercise.
4.Acute Pancreatitis
Sometimes, gallstones can set this off. It’s inflammation of the pancreas, which makes enzymes and hormones like insulin that help with digestion. It causes severe stomach pain, nausea, vomiting, and a fever, and can be life-threatening. Seek medical help immediately if you have these symptoms. It also can be caused by heavy drinking, high levels of calcium, or a kind of fat called triglycerides.
