1, acute cholecystitis: Pain usually occurs after meals or in the middle of the night, located in the right upper abdomen or upper abdomen, and sometimes the pain will spread to the right shoulder or scapula, accompanied by fever, vomiting, jaundice and other phenomena. 2, acute appendicitis: commonly known as appendicitis, most patients turn from upper abdominal pain to right lower abdominal pain, the pain peak is about 4 to 6 hours, and even the pain is aggravated by coughing or moving the body. 3, abdominal pain may be ureteritis, ureteral calculi, small abdominal pain is often accompanied by pain near the lumbar spine or waist pain, accompanied by paroxysmal colic and microscopic hematuria, ureteral tenderness. 4, acute gastroenteritis: mostly food poisoning caused by eating unclean food, usually accompanied by severe vomiting, diarrhea, fever and other symptoms. 5, prostatitis: it is the most common disease of male abdominal pain, mostly in young adults. Abdominal distension and pain, nocturia, frequent urination, urgency and dysuria are common at onset. It is recommended to check in time and treat the symptoms.

In short, we have to go to the hospital for a good examination to know the cause.