Is it normal for my periods to be irregular at first?

Yes. In the first year or two, irregular cycles are common and usually settle over time as ovulation becomes regular.

When should I see someone about my periods?

It's worth checking if periods are very heavy, very painful, or stop for several months after being regular. A GP can help.

Teenage Periods, Explained Simply

Periods in the teenage years: what's normal

Starting periods is a normal part of growing up, and it can take a while for a pattern to settle. This page explains what's usually expected in the teenage years and when something is worth reviewing.

It is general information for teens and parents and is not personal medical advice.

Key points

In the first year or two, cycles are often irregular, this is usually normal.
Cycle length settles over time for most people.
Simple period care and hygiene are easy to manage day to day.
Pain or bleeding that disrupts school or life is worth checking.

Last reviewed 1 July 2026

What's normal after periods start

For the first one to two years after periods begin, cycles are often irregular, periods may come closer together, further apart, or skip a month. This is usually because ovulation is still becoming regular, and it typically settles with time.

Looking after yourself during a period

Managing periods is straightforward once you know what suits you. Pads, tampons or period underwear are all options, changed regularly. A warm pack and simple pain relief can help with mild cramps. There is no need to change normal activities like sport or swimming.