Why breakthrough bleeding happens
Bleeding or spotting between your expected bleeds — called breakthrough bleeding — is one of the most common side effects of the pill, especially in the first three months as your body adjusts. It's usually not a sign that the pill isn't working, and it often settles on its own.
It's more likely if you've missed pills, taken them at inconsistent times, had vomiting or diarrhoea, or are taking certain other medications. Skipping the sugar (inactive) pills to avoid a period can also cause spotting.
What's usually nothing to worry about
Light spotting in the early months of a new pill, or when you first start skipping periods, is generally expected and not concerning. Taking your pill at the same time each day and not missing doses reduces it.
If it's just started and you've recently begun the pill, it's reasonable to give it a couple of cycles to settle while taking pills consistently.
When to see a GP
See a GP if breakthrough bleeding is persistent (continuing beyond three months), heavy, comes with pain, or starts after a long time of no problems on the pill. Also get checked if you have bleeding after sex, or any concern about a missed pill and pregnancy risk.
Sometimes a different pill formulation settles it, and sometimes your GP will check for other causes such as infection or a cervical issue. A telehealth consult can review your bleeding and adjust your pill or arrange any tests needed.
Related condition
Contraception & the pill →References & sources
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
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