Clinically, about two-thirds of the pain is rhythmic: epigastric pain begins 1 ~ 3 hours after breakfast, and will last until after lunch if you don't take medicine or eat. It hurts 2 ~ 4 hours after meals, but it can be relieved after meals. About half of patients have midnight pain, and patients often wake up with pain.
Rhythmic pain mostly lasts for several weeks, can recur, and can be relieved for several months.
It is considered that gastritis is an acute and chronic inflammation of gastric mucosa caused by many different reasons, which is often accompanied by epithelial injury, mucosal inflammatory reaction and epithelial regeneration.
Pain is generally diffuse upper abdominal burning pain, dull pain, swelling pain and so on. There is tenderness when pressing the upper abdomen or navel, no muscle tension, no rebound pain, and slightly overactive bowel sounds.
It is considered that pancreatitis is a pancreatic disease caused by trypsin self-digestion. Abdominal pain is often located in the middle and upper abdomen, sometimes radiating to the back. Bending or leaning forward can alleviate it, so if there is often pain in the middle of the upper abdomen, it is considered to be caused by pancreatitis.
Mild chronic pancreatitis has few positive signs, and some cases have mild tenderness in the upper abdomen; Late chronic pancreatitis can be malnourished due to seborrhea; If you have an acute attack, there may be moderate to severe tenderness in the middle of the upper abdomen.
It is considered that abdominal pain caused by gallstones is more common in the upper middle abdomen and the right upper abdomen, and mostly occurs when eating greasy food or suddenly changing body position during sleep. When there is no cholecystitis, there is only mild pain in the right upper abdomen. When serious infection occurs, it may involve tenderness in the upper and middle abdomen, and sometimes primary gallbladder swelling may occur.