Why do I feel depressed before my period?
You may feel depressed before your period because estrogen and progesterone fall in the late luteal phase, and in people sensitive to that change it lowers serotonin and mood. For many, it's a few low days of PMS. If it's severe, includes hopelessness and lifts after your period, it may be PMDD. If you're low all month and worse before your period, it may be depression.
If you 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. You don't have to wait for your period to pass.
Why your mood drops before your period
In the days before your period, both estrogen and progesterone fall. Estrogen supports serotonin, and progesterone's breakdown products act on the brain's calming GABA system. Most people's brains ride out these shifts. In people who are more sensitive to normal hormone changes, the same shifts can bring heaviness, hopelessness, tearfulness and loss of interest. It's biological, it's common, and it's not a character flaw.
PMS, PMDD or depression?
| PMS low mood | PMDD | Premenstrual exacerbation (PME) | |
|---|---|---|---|
| When | Last days before your period | 1 to 2 weeks before, every cycle | Depression all month, worse before your period |
| How bad | Noticeable, manageable | Severe; disrupts work, relationships | Varies; underlying depression is always there |
| After your period starts | Lifts within a few days | Lifts within a few days; at least a week symptom-free | Improves a bit but doesn't go away |
| Typical help | Self-care, exercise, sleep, planning | Doctor: SSRIs, hormonal options, CBT | Doctor: treat the depression, adjust for the cycle |
Learn more in depression before your period, PMDD and PME.
What helps
- Track two cycles. A one-tap daily mood check-in shows whether the low days cluster before your period. That record is exactly what a doctor needs.
- Keep moving. Regular aerobic exercise is one of the better-studied ways to ease PMS mood symptoms.
- Guard your sleep in the second half of your cycle.
- Lower the load. Plan easier days when you expect the dip.
- Reach out. Tell someone you trust that this week can be hard.
- Ask about treatment. SSRIs can work within days for premenstrual mood, and some can be taken just in the second half of the cycle.
Lulu learns how you usually feel in each phase and gives you a gentle heads-up before your harder days, so they feel less like they come from nowhere.
When to see a doctor
See a doctor if low mood before your period affects work, relationships or how you see yourself, if it lasts more than two weeks, or if you're low most of the month. Our PMDD self-check can help you describe it.
Frequently asked questions
Can PMS cause depression?
PMS can cause days of depressed mood, and PMDD can cause severe depression before periods. See can PMS cause depression.
Why do I feel suicidal before my period?
Severe premenstrual mood changes, including suicidal thoughts, can happen with PMDD. Please reach out for help right away: call your local emergency number or 988 in the US.
Does the depression go away when my period starts?
With PMS and PMDD, mood usually lifts within a few days of bleeding. See feel better when your period starts.
Can birth control help depression before my period?
Some combined pills help PMDD, others can lower mood for some people. A doctor can help you weigh options.
Sources
- Cleveland Clinic: Premenstrual dysphoric disorder (PMDD)
- Office on Women's Health: Premenstrual syndrome (PMS)
- IAPMD: About PMDD
- 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
Premenstrual depression: feeling low before your periodPremenstrual depression is low mood that arrives before your period and lifts after. Why it happens, PMS vs PMDD vs PME, and what treatment helps.
PMDD: premenstrual dysphoric disorder, explained kindlyPMDD is a severe, cyclical mood condition tied to your period. What it is, why it happens, how it's diagnosed, what treatment helps, and where to get support.Can PMS cause depression?Can PMS cause depression? It can cause depressed mood before your period, and PMDD can cause severe depression. How to tell them apart and get help.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.Luteal phase depression: why the second half of your cycle feels so heavyLuteal phase depression is low mood after ovulation that lifts with your period. What drives it, how it differs from PMDD and PME, and what helps.Premenstrual exacerbation (PME): when your cycle makes existing conditions worsePremenstrual exacerbation (PME) is when depression, anxiety, ADHD or another condition worsens before your period. How it differs from PMDD, and what helps.