--- title: Low mood at the end of your period: why it happens description: Low mood at the end of your period is common, often from hormone shifts right after bleeding ends. Here's why, how long it lasts, and what helps. url: https://niyora.com/symptoms/sadness-after-period/ --- - [Niyora](https://niyora.com/) - [Symptoms](https://niyora.com/symptoms/) - Low mood after your period: why it happens Symptoms # Low mood after your period: why it happens Feeling low once your period ends is usually a leftover of the cycle's lowest hormone point, and it typically lifts within a day or two as estrogen starts climbing again. If it lasts longer, or was already there before your period too, it may point to premenstrual exacerbation of an existing mood condition rather than ordinary PMS. Updated 14 October 2026 Niyora editorial Moderate evidence When it tends to show up Period Ovulation Before your period Shows up with your period and usually eases within a few days. ## At a glance - Estrogen and progesterone are at their lowest point of the cycle as your period ends, which can leave mood flat right before they climb again. - A short dip in mood after your period is common and usually eases within a day or two. - Sadness that lingers longer, or was present before your period too, may point to premenstrual exacerbation (PME) of an existing mood condition rather than ordinary PMS. - PMDD symptoms are expected to ease within days of bleeding starting, so sadness after your period alone doesn't usually fit that pattern on its own. - Tracking mood against your cycle for two months is the clearest way to tell PMS, PMDD, and PME apart. ## Strength of evidence Moderate evidence - None - Limited - Mixed - Moderate - Strong Hormone-mood links come from a 2021 meta-analysis of HPO-axis studies and a 1991 daily-ratings study of cyclic mood variation. The 60% PME figure and comorbidity findings come from dedicated 2021 and 2026 reviews, not studies of post-period sadness specifically. ## Why do you feel sad after your period? Estrogen and progesterone are both at their lowest point of the cycle as your period ends. Your body hasn't started building back up for the next cycle yet, so the hormones that usually lift mood are still near the floor. A 2021 systematic review of hormone studies in women with mood disorders found that PMDD was linked to lower estradiol levels in the luteal (second) half of the cycle [2], though most research points to PMDD being a different reaction to normal hormone changes rather than abnormal levels (Schmidt et al., 1998; Dubey et al., 2017). That points to some brains reacting more to where estrogen sits, and how it moves, than others do. Scientists haven't studied this directly, but a similar sensitivity to hormone shifts may carry into the first days after bleeding stops, even though the recognized PMS and PMDD window is the week before your period. A few things can add to a low feeling right after your period: - Hormones still sitting at their lowest point, before estrogen climbs for the next cycle - Blood loss and the fatigue that comes with it, which flattens mood on its own - Leftover PMS or PMDD symptoms that haven't fully cleared yet - An existing mood condition that worsens before your period and hasn't settled by the time it ends None of these make the sadness less real. They're reasons it's showing up now, not proof it doesn't matter. ## Is sadness after your period normal? A day or two of feeling flat or low once your period ends is common. A 1991 daily-ratings study of 30 regularly cycling women found mood measures shifted across the whole cycle, not only in the days right before bleeding, with a recognizable dysphoric-mood pattern showing up for many women on a cyclic basis [1]. Common doesn't mean it should be ignored. If the low feeling is heavier than a passing flat day, or it doesn't match what's actually going on in your life, treat that as useful information, not something to push through. [Sadness before your period](https://niyora.com/symptoms/sadness-before-period/) and [sadness during your period](https://niyora.com/symptoms/sadness-during-period/) tend to get more attention, since they sit closer to the classic PMS window. The days right after bleeding stops can carry a quieter version of the same dip, and it's easy to miss because you expect to feel better once your period is over, not still low. Paying attention to where the low feeling sits in your cycle, rather than just that it happened, makes the pattern easier to plan around the next time it shows up. Right now Right now, if the low feeling won't lift - 1 Name it out loud or in writing: "I feel low and my period just ended." - 2 Get outside for ten minutes if you can, daylight and movement both nudge mood a little. - 3 Text one person who'd want to know you're having a flat day, you don't have to explain why. - 4 Write down today's date and one line about how you feel, so you can check it against your next cycle. - 5 Eat something with real food in it, a skipped meal makes a low mood feel heavier than it is. Niyora walks you through this when it happens: - Calm down - - See it another way - - Choose what to say ## How long does it last? An ordinary post-period dip usually lifts within a day or two, as estrogen starts climbing again in the early days of the next cycle. It's likely something else if: - The low mood was already there before your period, not just after - It doesn't ease even once your period is fully over - You've noticed the same pattern most months, not just this one A 2021 review of premenstrual exacerbation (PME) found that around 60% of women with an existing mood disorder report it worsening before their period, and that PME tends to predict a harder overall course of illness, not just a one-time flare [3]. Unlike PMDD, which is expected to ease within a few days of bleeding starting and stay minimal the week after, PME symptoms carry over because the underlying condition is there all month, not only premenstrually. A broader comorbidity review found that mood disorders and PMDD or PMS overlap often, which is one reason low mood after your period deserves its own look rather than an automatic PMS label [4]. ## Is it linked to PMS or PMDD? PMS, PMDD, and PME follow different timing, and knowing which one fits matters for what helps. Here's how low mood after your period lines up with each pattern, or doesn't. | Pattern | When symptoms show up | What it looks like | | --- | --- | --- | | PMS | Days before your period, eases once bleeding starts | Physical or emotional symptoms, gone within a couple of days of your period starting | | PMDD | Last week before your period | Eases within days of bleeding starting and stays minimal the week after, confirmed by daily tracking over two cycles | | PME | Present all month, worse before your period | An existing condition like depression or anxiety that flares premenstrually and may not fully settle once bleeding ends | | Low mood after your period | First day or two after bleeding stops | A flat or sad feeling tied to the cycle's lowest hormone point, usually lifting as estrogen rises | If the sadness after your period keeps showing up, and it lasts longer than the first couple of days afterward, [PMDD sadness](https://niyora.com/symptoms/pmdd-sadness/) and [sadness in the luteal phase](https://niyora.com/cycle/luteal-phase-sadness/) cover the other ends of the same cycle and are worth reading next. Neither page will tell you which pattern fits on its own. Two months of daily notes will. ## What helps right now? Right now, the aim is to get through today, not to solve the whole pattern. If you want to see whether this dip lines up with your usual cycle, the [PMS calculator](https://niyora.com/tools/pms-calculator/) can estimate your window from your last few cycles, so you know whether a low day after your period is part of your normal pattern or something new. Niyora is a PMS and PMDD support app. If you want somewhere to put a low day before you decide what to do with it, Niyora's Moon lets you write down what happened, see it from another angle, and calm down before you respond to anyone or anything. None of this fixes the hormone dip on its own. It just gives the next hour somewhere to go. ## When does this need medical attention? That record is what lets a doctor tell PMS, PMDD, and PME apart, instead of guessing from one cycle. Treatment depends on what's actually going on, and a doctor decides what fits your pattern. Guidelines point to a few options: - SSRIs, sometimes taken only in the days before your period - Certain hormonal contraceptives - CBT (cognitive behavioral therapy) If an existing mood condition is getting worse before your period and still present once it ends, that's worth flagging to a doctor on its own. They decide what treatment fits, rather than you guessing at the order. A doctor can also rule out other causes if the pattern doesn't quite fit PMS, PMDD, or PME. Start with [what is PMS](https://niyora.com/premenstrual-syndrome/) if you want the fuller picture before your appointment. When to see a doctor See a GP or gynecologist if low mood after your period takes a week or more of every month, doesn't lift on its own, or comes with thoughts of hurting yourself. Bring two months of daily notes on your mood and your cycle. From the research library ## Research on low mood 1,946 studies in the library look at low mood in PMS and PMDD. They were published from 1964 to 2026, and each one has a short summary of what was tested and found. 1,946 studies, 1964 to 2026 How strong the studies are Strong study design 161 Moderate study design 660 Early or limited evidence 1,125 - [Cohort study, 2026What genetic factors are linked to premenstrual symptoms?One genetic location on chromosome 12 was clearly associated with PMS. The genetic factors linked to PMS are also linked to depression.Strong study design](https://niyora.com/research/papers/a-genome-wide-association-study-of-premenstrual-symptoms-in-two-nordic-2026/) - [Systematic review, 2026How often do mood disorders and PMS or PMDD occur together?Very often. Between 42% and 49% of women have both PMS or PMDD and a mood disorder at the same time, depending on which condition was diagnosed first.Strong study design](https://niyora.com/research/papers/a-systematic-review-and-meta-analysis-on-the-comorbidity-of-premenstrual-2026/) - [Systematic review, 2026Does continuous paroxetine or birth control work better for PMDD?Both antidepressants and birth control pills are effective for PMDD. Continuous paroxetine (an antidepressant) and DROS/EE 24/4 (a specific birth control) showed the strongest effects in studies reviewed, though the evidence comes from relatively few studies.Strong study design](https://niyora.com/research/papers/comparison-of-premenstrual-dysphoric-disorder-treatment-with-antidepressants-and-2026/) - [Randomised trial, 2026Does Kundalini Reiki help reduce PMS symptoms and improve quality of life?Yes, according to this rigorous double-blind study. Nursing students receiving Kundalini Reiki showed significantly greater improvements in PMS symptoms and quality of life compared to those who received placebo.Strong study design](https://niyora.com/research/papers/effect-of-kundalini-reiki-on-premenstrual-syndrome-symptoms-and-quality-of-life-2026/) - [Cohort study, 2026Does having PMS before pregnancy increase the risk of postpartum depression?Yes. Women with a PMS history were 45 percent more likely to develop postpartum depression within one year after birth, with 5.4 percent of women with PMS developing it compared to 3.8 percent without PMS.Strong study design](https://niyora.com/research/papers/effect-of-premenstrual-syndrome-on-the-risk-of-postpartum-depression-within-one-2026/) - [Systematic review, 2026Does vitamin D supplementation help PMS symptoms?Vitamin D reduced overall PMS severity and particularly helped with physical symptoms and depression, but the certainty of this evidence is very low. We cannot be confident in these findings yet and more high-quality research is needed.Strong study design](https://niyora.com/research/papers/efficacy-of-vitamin-d-supplementation-to-alleviate-premenstrual-syndrome-2026/) [See all 1,946 studies on low mood and depression](https://niyora.com/research/topics/symptom-depression-mood/) ## Questions people ask Is it normal to feel sad right after your period ends? + Yes, feeling sad or flat for a day or two after your period is common. Estrogen and progesterone are both near their lowest point as bleeding ends, and some people feel that dip in mood before the hormones start climbing again. It usually lifts within a couple of days. Why do I feel low a few days after my period instead of before it? + Low mood after your period can mean the usual pre-period dip is lingering, or that an existing mood condition worsened before your period and hasn't settled yet (premenstrual exacerbation). Timing it against your cycle for two months shows which pattern fits. Can sadness after your period be PMDD? + PMDD symptoms are supposed to ease within a few days of bleeding starting and stay minimal the following week. Sadness that continues after your period ends doesn't fit the typical PMDD pattern on its own, but it's worth tracking alongside an existing mood condition or PME. How do I know if it's PMS, PMDD, or something else? + PMS eases once your period starts. PMDD requires at least five symptoms, one a mood symptom, confirmed by daily tracking over two cycles. If low mood is present most days, not just before your period, it may point to an existing mood disorder getting worse premenstrually (PME). When does low mood after your period need medical attention? + Talk to a GP or gynecologist if low mood after your period takes a week or more of every month, doesn't lift, or comes with thoughts of hurting yourself. Bring two months of daily notes on mood and where you are in your cycle. It helps pinpoint the pattern. ## Sources - 1. [Daily moods and symptoms: effects of awareness of study focus, gender, menstrual-cycle phase, and day of the week](https://doi.org/10.1037//0278-6133.10.3.180), Health psychology : official journal of the Division of Health Psychology, American Psychological Association, 1991 - 2. [Variation in genes and hormones of the hypothalamic-pituitary-ovarian axis in female mood disorders - A systematic review and meta-analysis](https://doi.org/10.1016/j.yfrne.2021.100929), Frontiers in neuroendocrinology, 2021 - 3. [Premenstrual Exacerbations of Mood Disorders: Findings and Knowledge Gaps](https://doi.org/10.1007/s11920-021-01286-0), Current psychiatry reports, 2021 - 4. [A systematic review and meta-analysis on the comorbidity of premenstrual dysphoric disorder or premenstrual syndrome with mood disorders: prevalence, clinical and neurobiological correlates](https://doi.org/10.1192/bjp.2025.133), The British journal of psychiatry : the journal of mental science, 2026 Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗ On this page - [Why do you feel sad after your period?](#why-do-you-feel-sad-after-your-period) - [Is sadness after your period normal?](#is-sadness-after-your-period-normal) - [How long does it last?](#how-long-does-it-last) - [Is it linked to PMS or PMDD?](#is-it-linked-to-pms-or-pmdd) - [What helps right now?](#what-helps-right-now) - [When does this need medical attention?](#when-does-this-need-medical-attention) - [Research](#research) - [Questions](#faq) Niyora PMS & PMDD support For the hard moment before your period. Private, no account. [Get it on iPhone](https://apps.apple.com/app/niyora-pms-emotions/id6764561688) ## Keep reading Condition What is PMS? Premenstrual syndrome, explained Guide All symptoms Symptom The PMS blues: why sadness hits before your period Symptom PMDD sadness: what it feels like and what helps Symptom Sadness during your period: why it happens Cycle guide Sadness in the luteal phase: why it happens Article How to stop crying when you can't stop, and what helps Guide PMS calculator Guide Take the two-minute check