Understanding Frequent Periods: Causes & When to Consult a Doctor

Having two menstrual periods in one month isn't usually a cause for concern. Sometimes you may have a breakthrough bleed between periods, which results from a slight drop in progesterone levels. This is harmless and very common – particularly if you are new to oral contraceptive pills.

Menstruating twice a month might also indicate that you've ovulated twice in the same cycle. This can also happen during times of hormonal imbalance – for example, if you've recently come off the contraceptive pill or had a coil removed.

As a general rule, see a healthcare professional if your periods become abnormally heavy or frequent. You should also seek advice if you've been bleeding heavily for a week or more, passed unusually large clots or experienced prolonged pain.

Source: NHS