# Bloating and your cycle

> Why your jeans feel tighter before your period.

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

## Quick answer

Bloating before and during a period is common and linked to hormone changes that affect fluid balance and digestion. It usually peaks just before the period and eases a few days in. Gentle exercise, regular meals, cutting back on salt and fizzy drinks, and easing constipation can help. Persistent bloating that is not cyclical should be checked.

- Bloating before periods is a very common PMS symptom.
- Movement, water, smaller meals and less fizz can help.
- Bloating that does not settle, especially with other symptoms, needs a GP check.

Feeling puffy before or during your period? Bloating is one of the most common [PMS](https://splash.care/learn/glossary/pms) symptoms on the NHS list, and the NHS notes that some people feel bloated around the time of their period. [Hormone](https://splash.care/learn/cycle-basics/hormones-explained) changes can affect how much water you hold onto and how fast your gut moves. In a study of healthy women, most reported at least one gut symptom around their period.

## What helps period bloating?

- Move regularly: [exercise](https://splash.care/learn/period-care/exercise-on-period) helps digestion, and helps when you are already bloated.
- Drink plenty of water.
- Eat smaller, more frequent meals, and chew with your mouth closed so you swallow less air.
- Cut back on fizzy drinks, [alcohol](https://splash.care/learn/nutrition/caffeine-alcohol) and caffeine.
- If you are constipated, soluble [fibre](https://splash.care/learn/glossary/fibre) like oats or linseed can help.
- Massage your tummy from right to left to help shift trapped wind.
- A pharmacist can suggest medicines such as simeticone for bloating, or laxatives for constipation.

- **Luteal:** Bloating often builds in the days before your period.
- **Period:** Usually eases once your period gets going.

## When bloating is not about your cycle

The NHS says bloating that does not go away can occasionally be a sign of something more serious, such as ovarian cancer. This is rare, and bloating has many more common causes, such as constipation, food intolerances, coeliac disease and [IBS](https://splash.care/learn/glossary/ibs). But NICE says to arrange tests in primary care for anyone with persistent or frequent bloating, feeling full quickly or loss of appetite, pelvic or tummy pain, or needing to wee urgently or more often, particularly more than 12 times a month. The pattern to notice is **bloating that does not follow your period**.

> **Splash says:** log bloating in Splash. If it always shows up before your period and leaves after, that is your cycle talking. If it carries on all month, show your log to a GP.

### When to see a doctor

See a GP if you feel bloated regularly, you have tried changing your diet but still feel bloated, or you have bloating with weight loss or blood in your poo. Ask for an urgent GP appointment or call NHS 111 if bloating comes with being sick, diarrhoea or constipation, a tummy ache, a fever, a lump or swelling in your tummy, or you cannot pee, poo or fart. Call 999 if you have a swollen stomach with a severe stomach ache that came on suddenly, or you are vomiting blood.

**Quick quiz:** Cycle-related bloating usually…

1. Lasts all month
2. Builds before your period and eases after it starts
3. Only happens at ovulation

Answer: Builds before your period and eases after it starts. PMS bloating typically comes in the luteal phase and settles as your period gets going. Bloating on most days is worth a GP check.

## Sources

1. [NHS: Bloating](https://www.nhs.uk/symptoms/bloating/)
2. [NHS: PMS (premenstrual syndrome)](https://www.nhs.uk/conditions/pre-menstrual-syndrome/)
3. [NHS: Ovarian cancer symptoms](https://www.nhs.uk/conditions/ovarian-cancer/symptoms/)
4. [NICE NG12: Suspected cancer: recognition and referral (ovarian cancer)](https://www.nice.org.uk/guidance/ng12/chapter/Recommendations-organised-by-site-of-cancer)
5. [Bernstein et al. (2014) Gastrointestinal symptoms before and during menses in healthy women, BMC Women's Health](https://pmc.ncbi.nlm.nih.gov/articles/PMC3901893/)

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).