Excuse me schoolgirl menstruation is normal a few days

Female menstruation is normal for about 3-7 days. If menstrual days are reduced or prolonged, consider improper menstrual diet, strenuous exercise, endocrine disorders, poor constitution or endometriosis, pelvic inflammatory disease and other gynecological diseases. It is recommended to see a regular hospital for B ultrasound and other examinations to investigate disease factors.