What Can Cause an Early Period?

Irregular periods are among the most commonly reported menstrual difficulties. Irregular menstruation includes early periods, late periods and missed periods. Early periods can have many causes and are usually nothing to worry about, but they can occasionally indicate serious health problems.

• Intense exercise can cause early periods.

Background

• Menstrual cycles vary considerably. Periods usually last about five days, but a range of three to seven days is considered normal. The entire menstrual cycle can range from 20 to 35 days.

Stress

• Worry and anxiety can affect your hormones. In turn, this can lead to an early period.

Exercise

• Intense exercise can also cause your hormones to become imbalanced, causing an early period.

Menarche

• Girls who have just begun menstruating may find that it takes up to three years for their periods to regulate, and they may sometimes get early periods.

Birth Control Pills

• Your body may take several months to get used to the hormones in birth control pills. The hormone fluctuation may cause early periods.

Complications

• An early period is occasionally a symptom of a deeper health issue, such as polycystic ovary syndrome. If you experience heavy bleeding, extreme cramping, nausea or fainting, see a doctor.