If the use of nifurtimox appeared small abdominal pain, in the clinical some are normal phenomenon, some are abnormal phenomenon. If abdominal pain occurs within ten minutes after taking the medicine, and the pain is a vague swelling, most of them will be relieved in about five minutes, it is the pain caused by uterine contraction due to the stimulation of the drug, and the clinic can continue to use the medicine is a normal phenomenon. If there is persistent pain in the lower abdomen after taking the medicine, and it lasts for a long time and does not get better after resting, it is mostly caused by chronic inflammation of the pelvis. After the drug stimulation caused by the inflammatory reaction in the pelvic cavity after the drug aggravation of congestion, so it will lead to persistent pain in the lower abdomen, it is recommended to do gynecological examination, if the uterine adnexa does have pressure pain, and actively oral antibiotics for treatment, which is anomalous phenomenon.