# Ovulation pain (mittelschmerz): normal or not?

> A one-sided twinge mid-cycle is common. Here is when it is worth checking.

Category: Body literacy · 4 min read · Written by the Splash team · Sources checked October 2026
URL: https://splash.care/learn/body-literacy/ovulation-pain

## Quick answer

Ovulation pain (mittelschmerz) is a one-sided ache or twinge in the lower tummy around the middle of your cycle, when an ovary releases an egg. The NHS says about 1 in 5 people get it. It lasts from minutes to about 48 hours and usually eases with painkillers and heat. Severe or lasting pain should be checked.

- Ovulation pain is a one-sided lower-tummy ache mid-cycle; the NHS says about 1 in 5 people get it.
- It lasts minutes to about 48 hours and usually responds to painkillers and heat.
- Severe, long-lasting or unusual pain, or pain when you could be pregnant, needs checking.

[Ovulation](https://splash.care/learn/glossary/ovulation) pain, also called [Mittelschmerz](https://splash.care/learn/glossary/mittelschmerz) (German for “middle pain”), is a one-sided ache or twinge in the lower tummy around the middle of your cycle, when an ovary releases an egg. The NHS says it affects about 1 in 5 people who have periods and is usually harmless.

## What does ovulation pain feel like?

- A dull ache or a sudden sharp twinge, low down on one side.
- Lasting from a few minutes to about 48 hours.
- Sometimes with a little [spotting](https://splash.care/learn/glossary/spotting) or extra clear, stretchy [discharge](https://splash.care/learn/body-literacy/discharge-decoded).
- It can switch sides from month to month, depending on which ovary releases the egg.

## When does ovulation pain happen?

[Ovulation](https://splash.care/learn/phases/ovulation) usually happens 10 to 16 days before your [next period](https://splash.care/tools/period-calculator), so in a 28-day cycle the pain tends to show up around day 14. If your cycles are longer or [irregular](https://splash.care/learn/cycle-basics/irregular-cycles), it comes later or varies.

## What helps ovulation pain?

- Simple painkillers such as paracetamol or ibuprofen (check they are suitable for you).
- A warm bath or hot water bottle.
- If it is severe every month, hormonal [contraception](https://splash.care/learn/contraception/methods-overview) that stops ovulation can help: talk to a GP.

> **Splash says:** log the side and the day. A few months of notes shows whether it really lines up with ovulation, which is useful if you ever need to describe it to a doctor.

### When to see a doctor

See a GP if the pain is severe, lasts more than a couple of days, or comes with heavy bleeding, pain during sex or a fever. Get urgent help if you could be pregnant and have one-sided pain, or the pain is sudden and severe, as these need ruling out other causes such as ectopic pregnancy, appendicitis or an ovarian cyst.

## Sources

1. [NHS: Ovulation pain](https://www.nhs.uk/conditions/ovulation-pain/)
2. [NHS: Periods and fertility in the menstrual cycle](https://www.nhs.uk/conditions/periods/fertility-in-the-menstrual-cycle/)
3. [NHS: Ectopic pregnancy](https://www.nhs.uk/conditions/ectopic-pregnancy/)

This is general information, not medical advice. Splash can’t diagnose. If you’re worried, talk to a GP, pharmacist or sexual health clinic. In an emergency call 999 (UK) or 911 (US).