Mesenteric lymphadenitis in adults includes symptoms such as cough, sore throat, fever, abdominal pain, nausea, and more. Mesenteric lymphadenitis is very common and is often secondary to upper respiratory tract infections. When upper respiratory tract infections occur, patients may experience fever, sore throat, and cough. After the occurrence of mesenteric lymphadenitis, the patient will have abdominal pain, usually in the right lower abdomen and periumbilical pain, often accompanied by nausea, physical examination of the right lower abdomen will have pressure pain, and even rebound pain, muscle tension. It is recommended that the patient should go to the hospital in time and complete the relevant examinations, such as blood routine, ultrasound, CT, etc., to make a clear diagnosis. After the diagnosis is confirmed, anti-infection treatment is needed, and it is recommended that intravenous infusion of antibiotics with broad-spectrum antibacterial effect is recommended. Symptomatic treatment is also needed, and if fever occurs, cooling treatment is needed, and if the patient’s diet is poor, intravenous rehydration is needed.