A heavier first period can be caused by endocrine disorders, inflammation and infection. If there is an endocrine disorder, the first menstrual bleeding will usually be heavier. If there is inflammation in the female genital organs, the local blood vessels will become particularly fragile, and the amount of menstrual bleeding will be heavier at this time, and may even be accompanied by prolonged menstrual period phenomenon. It is recommended that women pay more attention to local hygiene, and if there are other uncomfortable symptoms, such as abdominal pain, infection, persistent bleeding, etc., it is recommended to go to the hospital for examination and treatment under the guidance of the doctor after clarifying the cause of the disease.