Vacation refers to menstruation. Four days early menstruation may be a normal physiological phenomenon, or it may be caused by endometritis, endometrial polyps and other pathological reasons, which is an abnormal phenomenon.
1. Normal physiological phenomenon: the normal menstrual cycle is usually about 28 days, in the normal menstrual cycle, one week ahead and one week behind are normal phenomena, so menstruation delayed for four days is also a normal phenomenon.
2. Endometritis: When a woman suffers from endometritis, the endometrium will be congested and edematous, which will cause her menstruation to be four days early.
3. Endometrial polyps: The exact cause of endometrial polyps is unknown, but it may be related to long-term estrogen stimulation and inflammation, which usually affects menstruation and leads to disruption of the menstrual cycle, making menstruation earlier.
If a woman experiences menstruation four days early, it is recommended that she go to the hospital for a checkup to clarify the cause and then treat it.