There are many reasons for the absence of menstrual period and abdominal pain, which need to be accurately diagnosed as follows: 1. Early pregnancy: women of childbearing age have regular menstrual cycles, if the above symptoms occur, we need to consider whether it is an early pregnancy reaction; 2. Endocrine disorders: women due to overwork, late night, irregular life, resulting in endocrine disorders, which leads to menstrual disorders and abdominal pain; 3. Emotions: the patient is overly nervous, anxious or mental illness, which will aggravate the endocrine disorders and cause irregular menstrual periods and abdominal pain; 4. 3, Emotions: patients with excessive tension, anxiety or mental illness will aggravate endocrine disorders, which will lead to irregular menstrual periods and abdominal pain; 4, Other: patients may be cold, chilled, frozen, and malnutrition, which can lead to the above symptoms.