A woman's period is normal for a few days.

Normal menstruation of women generally 3 to 7 days, a menstrual total blood loss of 30 to 50 ml, more than 80 ml called menorrhagia, less than 20 ml called menorrhagia. If the menstrual duration is shorter than three days, indicating that the menstrual period is too short, often accompanied by a significant reduction in menstrual volume, may be caused by eating cold or cold drinks during menstruation, or may be caused by thin endometrium. If the menstrual period exceeds seven days, it is often caused by insufficient luteal function, accompanied by menorrhagia, which may be caused by endometrial hyperplasia, or space-occupying lesions of the uterus, such as endometrial polyps, uterine submucosal myoma, etc. It is recommended to see a regular hospital in time to identify the causes and targeted treatment.