How is it caused that a 5-year-old child has swollen lymph nodes in the abdomen?

Patient's question:

No

Doctor's answer:

Hepatic lymph node enlargement, accompanied by abdominal pain, or fever, etc. It is acute mesenteric lymphadenitis. Acute mesenteric lymphadenitis is a disease commonly seen in children, often occurring one week after a "cold." Ordinary anti-inflammatory drugs can be used, such as penicillin, cephalosporins, etc.