--- title: PMDD flu-like symptoms: what it feels like and what helps description: PMDD flu-like symptoms can bring body aches, chills, fatigue and headaches before your period. Here's why it happens and what helps right now. url: https://niyora.com/symptoms/pmdd-flu-like-symptoms/ --- - [Niyora](https://niyora.com/) - [Symptoms](https://niyora.com/symptoms/) - PMDD flu-like symptoms: what it feels like and what helps Symptom # PMDD flu-like symptoms: what it feels like and what helps PMDD flu-like symptoms are the body aches, chills, fatigue and headaches some women get in the week before their period, without an actual virus. They aren't a true flu, but scientists think the same hormone drop that triggers PMDD's mood symptoms (Schmidt et al., 1998; Dubey et al., 2017) can also produce similar feelings, though why some women react this way isn't fully understood. They usually ease within a few days of your period starting. Updated 14 October 2026 Niyora editorial ## At a glance - PMDD flu-like symptoms, body aches, chills, fatigue and headache, show up in the week before your period and ease once it starts. - They aren't caused by a virus, so a genuine fever or contagious illness is worth checking separately. - PMDD needs at least five symptoms, including one mood symptom, confirmed by daily tracking across two cycles. - Warmth, fluid and gentle movement can ease the ache in the moment while hormones settle. - A doctor can weigh options like SSRIs or hormonal contraceptives against your own pattern once you've tracked two cycles. ## What does PMDD flu-like symptoms feel like? PMDD flu-like symptoms are the body aches, chills, fatigue and headaches that some women get in the days before their period, without an actual virus. You might feel hot and then cold, achy in your joints and muscles, and drained in a way sleep doesn't fully fix. These physical symptoms sit alongside at least one mood symptom in PMDD: mood swings, irritability, low mood or anxiety, plus enough other symptoms to reach five total. Common flu-like signs include: - A low-grade feeling of fever, without a measured temperature rise - Chills or feeling cold - Muscle or joint aches - Headache - Fatigue that rest doesn't fully clear - Sometimes nausea or dizziness A pattern that repeats the same week every cycle and eases once bleeding starts is what points to PMDD, not any one symptom on its own. See the full list of [PMDD symptoms: the 11 DSM-5 symptoms, explained](https://niyora.com/symptoms/pmdd-symptoms/) and how it's diagnosed on the [PMDD (premenstrual dysphoric disorder), explained](https://niyora.com/pmdd/) hub page. ## How is it different from PMS flu-like symptoms? PMS can include the same body aches, chills and fatigue, but PMS doesn't require a mood symptom or a set number of symptoms overall. PMDD is a diagnosis in DSM-5-TR and ICD-11: at least five symptoms, one of them a mood symptom, confirmed by daily ratings over two cycles. | Feature | PMS | PMDD | | --- | --- | --- | | Flu-like symptoms | Can happen, often mild | Can happen, often harder to push through | | Mood symptom required | No | Yes, at least one | | Total symptoms needed | Not defined | At least five | | Confirmed by | How you feel that cycle | Daily ratings across two cycles | | How common | Most cycles, to some degree | About 1.6 to 3.2% with a confirmed diagnosis (Reilly et al., 2024) | Early pregnancy can also cause aches, fatigue and chills, so if your period is late, it's worth ruling that out. Read [PMS or pregnant? How to tell the difference](https://niyora.com/conditions/pms-or-pregnant/) for how to tell them apart. For more on the symptom itself, see [flu-like symptoms before your period: why it happens and what helps](https://niyora.com/symptoms/flu-like-symptoms-before-period/). Right now What to do when PMDD flu-like symptoms hit - 1 Run a hot shower or put a heating pad on your lower back for about 10 minutes. - 2 Drink a full glass of water, dehydration can make aches feel worse. - 3 Put on warm socks and a layer you can take off if chills turn to heat. - 4 Take a slow 10 minute walk if you can manage it, stiffness often eases with gentle movement. - 5 Move or cancel anything non-essential for the next few hours instead of pushing through. Niyora walks you through this when it happens: - Calm down - - See it another way - - Choose what to say ## When in your cycle is it worst? These symptoms cluster in the luteal phase, the one to two weeks between ovulation and your period, and peak in the final few days before bleeding starts. Estrogen and progesterone both drop sharply right before your period. Scientists think the same hormone drop that triggers PMDD's mood symptoms (Schmidt et al., 1998; Dubey et al., 2017) can also produce body aches, chills and fatigue, though why some women react this way isn't fully understood. Read more on the luteal phase and flu-like symptoms: why it happens. Most women notice: - Little or nothing in the first half of the cycle - Mild aches or fatigue starting about a week before the period - The heaviest flu-like feeling in the last one to three days before bleeding - Quick easing within a day or two once the period starts If you want to see where you likely are right now, the [PMS calculator: when will your PMS start?](https://niyora.com/tools/pms-calculator/) estimates your window from your last few cycles. ## What can you do when it hits? When the aches and chills show up, your body is asking for warmth, fluid and rest, not a diagnosis. A hot shower, a heating pad on your lower back or shoulders, and a full glass of water can take the edge off within about twenty minutes. Chills often ease faster than people expect once you're genuinely warm, not just covered up. Gentle movement, like a slow walk around the block, can help more than lying still once the worst of the cold passes, even though lying down feels like the only option at first. If exhaustion is making it hard to think clearly, that's often a sign to lower what you're asking of yourself for the next few hours rather than push through on willpower. In the moment Niyora is a PMS and PMDD support app. If you're too drained to figure out what to say to someone right now, Niyora's Moon lets you write what happened, see it from another angle and draft a reply you can hold onto until you have more in you. ## Which PMDD treatments help flu-like symptoms? A doctor can review treatments that target the hormone pattern behind PMDD, not just the aches on their own. | Option | What it does | Evidence strength | | --- | --- | --- | | SSRIs (such as fluoxetine) | Can ease physical symptoms like joint and muscle pain, headache and bloating, alongside mood symptoms | Strong: multiple placebo-controlled trials [1] [8] | | Combined oral contraceptives | May reduce depressive symptoms and overall premenstrual symptom load | Moderate, varies by formulation [7] | | Transdermal estrogen | Stops the ovulation-linked hormone swing some women react to | Limited, small trials [2] | | Magnesium | May ease fluid-related symptoms like bloating and swelling | Limited, small trial, effect only in second cycle [3] | | Vitamin D | May reduce overall PMS severity and physical symptoms | Early evidence, high uncertainty [5] | **A doctor decides what's right for you**, based on your symptoms, health history and how the pattern tracks over two cycles. ## How do you track it for your doctor? Tracking turns a monthly feeling into a pattern a clinician can act on. - Note the date and where you are in your cycle each day - Rate flu-like symptoms (aches, chills, fatigue, headache) on a 0 to 3 scale - Mark any mood symptoms the same day, since PMDD needs at least one - Keep this going for two full cycles - Note how many days it takes to ease after your period begins Bring two months of this tracking to your appointment instead of describing a typical week from memory. Many women are surprised by how much the pattern tightens once it's written down day by day, rather than recalled afterward. When to see a doctor If this takes a week of every month, see a GP or gynecologist and bring two months of daily notes. ## What does the research say? PMDD flu-like symptoms haven't been studied as their own category. Most research groups them under physical symptoms in broader PMS and PMDD trials. A 2002 placebo-controlled fluoxetine trial found women with PMDD had less bloating (p=.001), joint and muscle pain (p=.037) and breast tenderness (p<.001) than women on placebo, alongside improved mood symptoms [8]. An earlier 2001 trial also found fluoxetine improved physical symptoms like breast tenderness, bloating and headache compared with placebo [1]. Physical premenstrual symptoms are common more broadly: over 90% of working women in one UK survey reported some premenstrual symptoms, and 40% called them moderate or severe [6]. A systematic review of female athletes also found premenstrual symptoms, including physical ones, were common across the studies reviewed, though definitions varied a lot between them [4]. None of this proves flu-like symptoms have one single cause. Scientists think the hormone drop before your period, combined with how sensitively your body reacts to it, plays a part, the same pattern researchers describe for PMDD's mood symptoms. ## Questions people ask What are PMDD flu-like symptoms? + PMDD flu-like symptoms are body aches, chills, fatigue, headache and a hot-then-cold feeling that some women get in the week before their period, without an actual virus. They come alongside a mood symptom like irritability or low mood, and ease within a few days of the period starting. Can PMDD cause a real fever? + PMDD flu-like symptoms usually bring a feeling of fever, hot, cold and achy, rather than a measured temperature rise. If you take your temperature and it's genuinely high, that points toward an infection or another cause, and it's worth checking with a doctor rather than assuming it's hormonal. How is period flu PMDD different from the regular flu? + Period flu from PMDD causes aches, chills and fatigue without the cough, congestion or contagious spread of a viral flu. It shows up the same week every cycle and clears within days of your period starting, while a real flu follows its own separate timeline unrelated to your cycle. When do PMDD flu-like symptoms usually start? + PMDD flu-like symptoms usually start about a week before your period, in the luteal phase, and peak in the final one to three days before bleeding. They typically ease within a day or two once your period begins, following the same timing as PMDD's mood symptoms. Do PMDD treatments help flu-like symptoms? + Some PMDD treatments that target the underlying hormone pattern, including SSRIs taken in the luteal phase and some hormonal contraceptives, have reduced physical symptoms like joint pain, headache and bloating in trials. A doctor can help you weigh these against your own symptoms and health history. ## Sources - 1. [The efficacy of fluoxetine in improving physical symptoms associated with premenstrual dysphoric disorder](https://doi.org/10.1111/j.1471-0528.2001.00120.x), BJOG : an international journal of obstetrics and gynaecology, 2001 - 2. [Non-contraceptive oestrogen-containing preparations for controlling symptoms of premenstrual syndrome](https://doi.org/10.1002/14651858.cd010503.pub2), The Cochrane database of systematic reviews, 2017 - 3. [Magnesium supplementation alleviates premenstrual symptoms of fluid retention](https://doi.org/10.1089/jwh.1998.7.1157), Journal of women's health, 1998 - 4. [The Prevalence of Menstrual Cycle Disorders and Menstrual Cycle-Related Symptoms in Female Athletes: A Systematic Literature Review](https://doi.org/10.1007/s40279-023-01871-8), Sports medicine (Auckland, N.Z.), 2023 - 5. [Efficacy of Vitamin D Supplementation to Alleviate Premenstrual Syndrome Symptoms: A Systematic Review and Meta-Analysis of Randomized Controlled Trials](https://doi.org/10.3390/jcm15124828), Journal of clinical medicine, 2026 - 6. [Premenstrual Symptoms and Work: Exploring Female Staff Experiences and Recommendations for Workplaces](https://doi.org/10.3390/ijerph18073647), International journal of environmental research and public health, 2021 - 7. [Efficacy of combined oral contraceptives for depressive symptoms and overall symptomatology in premenstrual syndrome: pairwise and network meta-analysis of randomized trials](https://doi.org/10.1016/j.ajog.2021.06.090), American journal of obstetrics and gynecology, 2021 - 8. [Premenstrual daily fluoxetine for premenstrual dysphoric disorder: a placebo-controlled, clinical trial using computerized diaries](https://doi.org/10.1016/s0029-7844(02)02166-x), Obstetrics and gynecology, 2002 Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗ On this page - [What does PMDD flu-like symptoms feel like?](#what-does-pmdd-flu-like-symptoms-feel-like) - [How is it different from PMS flu-like symptoms?](#how-is-it-different-from-pms-flu-like-symptoms) - [When in your cycle is it worst?](#when-in-your-cycle-is-it-worst) - [What can you do when it hits?](#what-can-you-do-when-it-hits) - [Which PMDD treatments help flu-like symptoms?](#which-pmdd-treatments-help-flu-like-symptoms) - [How do you track it for your doctor?](#how-do-you-track-it-for-your-doctor) - [What does the research say?](#what-does-the-research-say) - [Questions](#faq) Niyora PMS & PMDD support For the hard moment before your period. Private, no account. 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