What's wrong with a child's stomach ache?

Patient's question:

Age
Detailed medical history and purpose of consultation: He always says his stomach hurts! When we take him to the hospital, there's nothing wrong!
Duration and frequency of the current illness: Whenever he says it hurts, we say he's hungry or full, and just go along with it!
Current general condition: Sometimes he says it hurts!
Medical history: 2 years
Previous diagnoses and treatments, as well as their effectiveness: He's also been to the hospital and said it was nothing.
Additional tests: None!
Other: None!

Doctor's answer:

The child frequently experiences stomach pain without fever or diarrhea. The pain is usually localized around the navel, and during episodes, the child may sweat profusely, have pale skin, or even roll around clutching their stomach. However, the pain often subsides on its own after a short while, and the child returns to normal eating and playing. Nevertheless, similar abdominal pain can occur again on the same day or the following day. This is a common condition known as "intestinal cramps," which are generally caused by allergic reactions to food or even cold, leading to the excitation of nerves that control the intestinal wall. The continuous spasm of the intestinal muscles results in severe pain, and the pain disappears when the spasm subsides. Each episode typically lasts a short time, with the pain coming in waves, usually resolving within minutes to half an hour on its own.
During abdominal examinations, the entire abdomen is soft and not distended, with no fixed tender points. Sometimes, gentle rubbing may even provide relief, which is a key difference from abdominal pain requiring surgery. The pain can recur repeatedly but does not affect the child's growth and development. As the child grows older, the frequency of episodes gradually decreases.
For typical intestinal cramps, medication or injections are generally not necessary. However, if the abdominal pain persists for multiple days, is continuous, or if the abdomen is tender to touch, accompanied by frequent vomiting, it is important to seek medical attention promptly to rule out conditions such as appendicitis, intussusception, biliary ascariasis, or intestinal obstruction.