My 10 year old son complained lower right stomach pain as it was 4 th time in 4 months I took him for checkup , in ultrasound report it was mentioned Mesenteric Lymphadenitis ( insignificant in size) . Doctor gave him 1 month medicine and suggested repeat ultrasound, which came out same as before . Mesenteric Lymphadenitis ( insignificant in size) . My question is what could be the reason for not getting it cleared in spite of having medication for 20-30 days . Can it be serious ? I am very much tensed , kindly reply soon and suggest.