Whether or not it is normal to have an early menstrual period each month depends on the patient’s specific situation. It is normal if the patient’s monthly period is early within 7 days because women’s menstruation is affected by various factors and can fluctuate physiologically. This physiological fluctuation is mainly refers to the patient’s menstrual cycle based on their original cycle, early or delayed within a week, which is normal and does not require special adjustment. If the patient’s menstruation is early for more than 7 days per month, or even once every half month, this is abnormal. There are two main reasons for early menstruation: 1) endocrine disorders, such as abnormal thyroid function, abnormal luteal function, etc., which require examination of sex hormone six and thyroid function; 2) organic lesions, such as endometrial polyps, cervical polyps, cervical cancer, etc., which require gynecological internal examination, cervical cancer screening, hysteroscopy, gynecological ultrasound and other related examinations for identification.