Why am I spotting on the pill?

Spotting, or breakthrough bleeding, is light unscheduled bleeding while on hormonal contraception. It is very common in the first three months as your body adjusts to the hormones, and it does not usually mean the pill has stopped working. It is more common on the mini pill and on low-dose or continuous combined pills.

Does breakthrough bleeding mean the pill isn't working?

No. Breakthrough bleeding on its own does not mean you are unprotected, as long as you have been taking your pill correctly. However, missing pills, being late, vomiting or severe diarrhoea can both reduce protection and cause spotting, so take your pill consistently.

When should I see a doctor about bleeding on the pill?

See a healthcare professional if breakthrough bleeding lasts longer than three months, is heavy, starts after months of no bleeding, or comes with pain, bleeding after sex, or other symptoms. These may need checking for other causes such as infection.

herPILL · your contraception guide

Spotting & breakthrough bleeding on the pill

Bleeding when you're not expecting to can be unsettling. In most cases it's a normal part of settling in — here's how to tell, and when to get it checked.

Talk to a pharmacist

Usually harmlessNHS guidanceClear red flags

Reviewed by a GPhC-registered pharmacist6-minute readSources: NHS · FSRH

Breakthrough bleeding — light bleeding or spotting between your expected bleeds — is one of the most common reasons women worry about their pill. It's also one of the most likely to settle on its own. Here's what's happening and what to do.

Watch: 1-minute explainer

Jawad Khan, Superintendent Pharmacist, on spotting and breakthrough bleeding · 64 seconds

The short answer: Spotting in the first 3 months is very common and usually settles. Keep taking your pill as normal — don't stop, or you risk pregnancy.

01Why it happens

When you start or switch a pill, the lining of your womb needs time to adjust to the new hormone levels. While it thins and stabilises, small areas can shed — that's the spotting you see. It's a settling-in effect, not a sign something's wrong.

It's more common in certain situations:

The first 3 months of a new pill or method.
The mini pill (progestogen-only) — irregular bleeding is its most common side effect.
Low-dose or continuous combined pills, and when running packs back-to-back to skip periods.
Missed or late pills, vomiting or diarrhoea — these cause hormone dips that can trigger spotting (and can reduce protection).
Smoking, which is also linked to more breakthrough bleeding.

Does it mean the pill isn't working? No — on its own, breakthrough bleeding doesn't mean you're unprotected, as long as you've taken your pills correctly. Taking your pill at the same time every day is the best way to reduce spotting and keep protection strong.

02What helps

Give it time: most spotting settles within 2–3 months as your body adjusts.
Take it at the same time daily: consistency is the single biggest factor, especially on the mini pill.
Don't stop the pill because of spotting unless advised — stopping mid-pack risks pregnancy.
If you skip periods, a scheduled break every few packs can reset the lining and reduce spotting.
If it persists past 3 months, a different pill often solves it — that's a switch worth asking about.

03Normal vs worth checking

✓ Usually normal

Light spotting in the first 3 months
Occasional spotting on the mini pill
Spotting after a missed or late pill
Spotting when skipping periods back-to-back

⚠ Get it checked

Bleeding lasting longer than 3 months
Heavy bleeding, or bleeding that disrupts daily life
New bleeding after months of none
Bleeding after sex, or with pain
Any bleeding you're worried about

Persistent or unusual bleeding is worth a check not because it's likely serious, but because occasionally it points to something else — an infection like chlamydia, or a need to rule out other causes. A quick review sorts it, and often just means a better-suited pill.

04Quick answers

Is brown spotting on the pill normal?

Yes — brown spotting is just older blood and is a common, harmless form of breakthrough bleeding, especially in the first few months. Keep taking your pill as normal.

I've been on my pill for years — why am I spotting now?

New spotting after a long settled period is worth checking, as it's less likely to be simple adjustment. Missed pills, a stomach upset, a new medicine, or an infection can all be behind it — see a pharmacist or GP.

Does spotting mean I could be pregnant?

Breakthrough bleeding itself isn't a sign of pregnancy, but if you've missed pills or had a stomach upset and are worried, a pregnancy test and a chat with a pharmacist will put your mind at rest. See our missed-pill guide if relevant.

Will switching pills stop the spotting?

Often, yes — if spotting hasn't settled after three months, a different formulation frequently helps. A pharmacist can move you across safely.

Spotting that won't settle?

A herPILL pharmacist can check what's behind it and, if needed, switch you to a better-suited pill — free on the NHS.