Are mood swings before your period normal?
Yes. Mild to moderate mood swings in the week or two before your period are very common: over 90% of women report some premenstrual symptoms, and moodiness is one of the most frequent. They're normal if they ease within a few days of bleeding and don't stop you living your life. Severe, disruptive mood changes every cycle are worth a doctor's visit.
Why mood swings before your period are so common
After ovulation you enter the luteal phase. Progesterone rises, then both progesterone and estrogen drop in the days before your period. That drop affects serotonin and other brain chemicals that help steady mood. Some people barely notice; others feel more irritable, teary or anxious for a few days. Both are within normal.
The Office on Women's Health reports that over 90% of women get some premenstrual symptoms, such as bloating, headaches and moodiness, and that for most, symptoms are mild.
Normal, or worth checking?
| Usually normal | Worth talking to a doctor |
|---|---|
| More irritable, teary or sensitive for a few days | Depression, hopelessness or rage that feels out of your control |
| Starts in the week or two before your period | Present most of the month, not just before your period |
| Eases within about 4 days of bleeding | Doesn't lift when your period starts |
| You can still work, study and see people | Misses work or school, or damages relationships every cycle |
| Feels manageable with sleep, movement and rest | Nothing you try helps, or it's getting worse each year |
| No thoughts of harming yourself | Any thoughts of self-harm: get help now |
The right-hand column can point to PMDD, a severe form that affects an estimated 3 to 8% of people who menstruate, or to a mood condition that gets worse before periods. Neither is your fault, and both are treatable. See PMS vs PMDD.
How to tell which you have
Doctors diagnose PMS and PMDD from a symptom diary over at least two cycles, not a blood test. Rate your mood each day, along with your period days. You're looking for a pattern: worse in the luteal phase, better after bleeding starts, and a clear stretch in between. Our PMS self-check is a good first step.
Lulu's one-tap mood check-in takes seconds. After two cycles you'll see whether your mood swings follow your cycle, and you'll have a chart you can show your doctor.
Making normal mood swings easier
- Know which days are coming and plan lighter ones when you can.
- Keep a steady bedtime in the luteal phase.
- Move most days. A brisk walk counts.
- Eat regular meals and go easier on caffeine and alcohol in the two weeks before your period.
- Tell someone you trust which days are usually harder.
More ideas in how to stop PMS mood swings and our full guide to PMS mood swings.
Talk to a doctor if your mood is affecting your life. 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.
Frequently asked questions
Is it normal to cry for no reason before my period?
Yes, it's a common PMS symptom. See why do I cry before my period.
Is it normal to have mood swings during my period?
Some people feel low or tired in the first day or two, but most feel better as bleeding goes on. See mood swings during your period.
Do all women get mood swings before their period?
No. Many do, but some people notice little or no mood change across their cycle.
Can men tell when PMS mood swings happen?
Partners often notice a pattern before the person does. Sharing a gentle heads-up about harder days can help both of you.
Sources
- Office on Women's Health: Premenstrual syndrome (PMS)
- ACOG: Premenstrual Syndrome (PMS) FAQ
- NHS: PMS (premenstrual syndrome)
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
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.PMS vs PMDD: what's the difference?PMS vs PMDD side by side: symptoms, severity, how common each is, how they're diagnosed and treated, and how to tell which one fits what you feel.
How to stop mood swings before your period: 9 things that helpHow to stop mood swings before your period: what has real evidence (exercise, calcium, sleep, CBT, SSRIs), what to try first, and when to see a doctor.
PMS test: do my symptoms follow my cycle?Free PMS test: rate 11 common premenstrual symptoms and see whether yours look like mild PMS, typical PMS or something worth raising with a doctor.
Does your period affect your mood?Does your period affect your mood? Yes: hormones shift across all four cycle phases. How mood, energy and confidence usually change, and how to see yours.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.