What does it mean when your period stay on 3 days but suppose to 5 days?

There are several possible reasons why your period might only last for 3 days instead of your usual 5 days. Some of these reasons include:

Hormonal imbalances: Changes in hormone levels, such as estrogen and progesterone, can affect the length of your period. For example, if your estrogen levels are too low, you may have a shorter period.

Stress: Chronic stress can disrupt your menstrual cycle and cause it to become shorter or irregular.

Diet and exercise: Significant changes in your diet or exercise routine can also affect your menstrual cycle. For example, if you suddenly start exercising vigorously or make drastic changes to your diet, it could lead to a shorter period.

Pregnancy: If you are pregnant, it is normal for your period to stop altogether.

Menopause: As women approach menopause, their periods may become shorter and less frequent.

Certain medical conditions: Some medical conditions, such as thyroid problems or polycystic ovary syndrome (PCOS), can also affect the length of your period.

If you are concerned about your short period, it is always a good idea to talk to your doctor to rule out any underlying medical conditions. They can also provide guidance on how to manage any symptoms or concerns you may have.