Menstruation does not adjust amount much and ceaseless, want to know what reason is

Menstruation does not adjust amount much and does not go tardy, basically be caused by endocrine disorder in the body, the job that may be long time or mental pressure can be bigger, or long-term overwork, make the endocrine disorder of the body, cause the estrogen secretion in the body insufficient and cause the phenomenon that appears menstruation disorder thereby.