Small abdominal pain and back pain, but no menstruation, are mainly considered to be related to ovulation pain, irregular menstruation, early pregnancy and other causes. In addition to symptomatic and causal treatment, patients need to take proper rest to promote the recovery of the organism. Common causes and treatments 1. Ovulation pain: Due to the enlarged follicle discharge, some sensitive people can feel discomfort symptoms such as lower abdominal distension, lumbar and abdominal pain, which can even extend to the waist and inner femur in severe cases. This is a normal physiological phenomenon and patients need not worry too much. If the pain is unbearable, you can take ibuprofen and other drugs to relieve the pain under the guidance of a doctor. During this period, the patient should pay attention to keep warm and ensure personal hygiene; 2, menstrual disorders: overwork, mental stress and other factors can lead to endocrine disorders, and then delayed menstruation, some patients can also be accompanied by abdominal distension and other symptoms. If necessary, progesterone and other drugs can be taken under the guidance of a doctor to promote the onset of menstruation. The embryo grows on the endometrium, and sensitive pregnant women may have symptoms such as slight back and abdominal pain, which is a normal physiological phenomenon. However, if the lumbar and abdominal pain is very intense, abnormal pregnancy such as ectopic pregnancy needs to be ruled out and the pregnancy needs to be terminated in hospital; 4. Other: diseases such as pelvic inflammatory disease and cervical canal adhesion can also cause patients to have symptoms such as lumbar and abdominal pain during the non-menstrual period. pelvic inflammatory disease is often treated with drugs such as ofloxacin and levofloxacin.