What Can Cause an Early Period?
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Intense exercise can cause early periods.
Background
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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
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Worry and anxiety can affect your hormones. In turn, this can lead to an early period.
Exercise
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Intense exercise can also cause your hormones to become imbalanced, causing an early period.
Menarche
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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
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Your body may take several months to get used to the hormones in birth control pills. The hormone fluctuation may cause early periods.
Complications
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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.
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