Recurrent tummy pains in children with lymph nodes are caused by mesenteric lymphadenitis. Most of them are caused by improper diet, gastrointestinal dysfunction, constipation, or viral, bacterial, or parasitic infections that cause inflammation of the intestinal lymph nodes, resulting in enlargement of the mesenteric lymph nodes and causing recurrent stomach pains, which can be divided into acute nonspecific mesenteric lymphadenitis and chronic nonspecific mesenteric lymphadenitis.1. Acute nonspecific mesenteric lymphadenitis: Mostly after respiratory viral infections or intestinal inflammation. It usually coexists with acute fever or respiratory symptoms and has a relatively self-limiting tendency. It can be treated with antibiotics as prescribed by the doctor to avoid dehydration caused by excessive vomiting, fasting or giving the child an easily digestible liquid or semi-liquid diet depending on the condition; 2. Chronic non-specific mesenteric lymphadenitis: mostly caused by acute mesenteric lymphadenitis that does not heal. In most cases, symptomatic treatment is required, and mesenteric lymphadenitis caused by tuberculosis infection requires anti-tuberculosis treatment to achieve effective relief. Abdominal pain due to septic mesenteric lymphadenitis is less common, but the symptoms are more severe and may be accompanied by significant fever in addition to stomach pain, requiring surgical treatment for relief. During your child’s illness, it is important to get plenty of rest, drink more water, and eat a light diet on a daily basis so that your child’s condition can gradually improve.