Left abdominal pain accompanied by low fever without diarrhea may be caused by mesenteric lymphadenitis, intestinal cancer, ureteral inflammation, etc., which can be treated with medication, surgery, radiotherapy and chemotherapy. 1. Mesenteric lymphadenitis: in most cases, conservative treatment can be taken, generally need to use broad-spectrum antibiotic drugs, such as amoxicillin, cefadroxil, if there is a clear anaerobic bacterial infection area combined with anaerobic drugs, such as metronidazole, tinidazole. 2. Bowel cancer: once diagnosed in the early stage, timely surgical treatment should be adopted, and adjuvant radiotherapy should be carried out after surgery. When some patients are found to have advanced disease, they can not take surgical treatment, and can be treated with radiotherapy, chemotherapy and other integrated treatments. 3. Ureteral inflammation: often caused by bacterial infections need oral, antibiotic drugs, such as norfloxacin, levofloxacin, it is best to do drug sensitivity test, choose sensitive antibiotic drug treatment. Left abdominal pain accompanied by a low fever without diarrhea may also be caused by other reasons, such as colitis, etc., should be timely consultation, with the doctor to take the examination and treatment.