Why do I cry before my period?
You cry more easily before your period because estrogen and progesterone fall in the last days of your cycle, and that drop affects serotonin, a brain chemical that steadies mood. Some brains are more sensitive to this normal change than others. Tiredness and stress make it stronger. Tears usually ease within a few days of your period starting.
What's happening in your body
After ovulation, progesterone and estrogen rise. In the days before your period, both fall. Researchers think PMS mood symptoms aren't caused by abnormal hormone levels, but by some people's brains reacting more strongly to these normal changes. The drop seems to affect serotonin and GABA, which help regulate mood, sleep and how much things get to you.
The result: an advert, a kind message or a small criticism lands much harder than it would in week two. It's a real physical effect, not you being dramatic.
Things that make the tears stronger
- Short or broken sleep, which is common before a period
- Stress, a packed calendar, or difficult conversations in your luteal week
- Alcohol, which lowers mood the next day
- Skipping meals, which adds irritability and tiredness
- Underlying anxiety or depression, which PMS can intensify
What helps
| Try | Why it helps |
|---|---|
| Know when it's coming | Tears feel less scary when you expect them |
| Let yourself cry | It often relieves tension; you don't have to fight it |
| Protect sleep that week | Tiredness amplifies every feeling |
| Move a little | Regular aerobic exercise has good evidence for PMS |
| Lighten your plans | Postpone hard talks and big decisions when you can |
| Tell someone you trust | A heads-up helps people respond kindly |
There's more on this in our pillar guide to crying before your period and on PMS mood swings.
A daily one-tap mood check-in for two cycles shows whether your teary days really cluster before your period. If they do, you can plan around them.
When crying might be more than PMS
If the tears come with hopelessness, feeling worthless, intense anger or panic, and it happens every cycle, it may be PMDD. If you feel low all month, with only a small dip before your period, it may be depression that gets worse premenstrually. Both are treatable. Our PMDD self-check can help you put it into words for a doctor.
If you ever have thoughts of harming yourself, please reach out now: call your local emergency number, or in the US call or text 988. In the UK, Samaritans are on 116 123. See a doctor if crying before your period disrupts work, relationships or how you feel about yourself.
Frequently asked questions
How many days before my period will I be teary?
Usually in the 5 to 10 days before, easing within a few days of bleeding. It's often worst in the last two or three days.
Is crying for no reason before my period normal?
Yes, it's one of the most common PMS symptoms. If it's severe or makes you feel hopeless, talk to a doctor.
Why do I cry more on my period itself?
Hormones are lowest at the start of your period, and tiredness and pain add up. Most people feel lighter by day 2 or 3. See mood during your period.
Can birth control stop crying before my period?
Some combined pills reduce PMS for some people; others find hormones affect their mood. It's worth discussing with a doctor.
Sources
- Office on Women's Health: Premenstrual syndrome (PMS)
- NHS: PMS (premenstrual syndrome)
- Schmidt PJ et al. Differential behavioral effects of gonadal steroids in women with and in those without premenstrual syndrome. NEJM (1998)
- 988 Suicide & Crisis Lifeline
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Crying before your period: why it happens and how to feel steadierCrying before your period at adverts, small comments or nothing at all? Why falling hormones make you teary, what helps, and when crying spells could be PMDD.
PMS mood swings: why they happen and what actually helpsTeary, snappy or anxious before your period? Why PMS mood swings happen in the luteal phase, what helps, and when it might be PMDD instead.Is it normal to feel sad before your period?Feeling sad before your period is common and usually lifts once bleeding starts. Why it happens, how to feel better, and when sadness needs more support.
PMDD test: a self-check before you talk to a doctorFree PMDD test: check your premenstrual symptoms against the pattern doctors look for, then learn how a real PMDD diagnosis works and what to bring.
Menstrual cycle mood: how you feel in each phase, and whyHow menstrual cycle mood changes through all four phases: what hormones do, why some people feel it more, and how to learn your own pattern.PMS and relationships: why you fight before her period, and how to stopPMS relationship problems are common. Why couples argue more before a period, how to break the monthly fight cycle, and what both partners can do.