Why Do My Hips Hurt Before My Period?

Hormonal changes in the days before your period lower your pain threshold, ramp up inflammation, and loosen the ligaments around your pelvis, all of which can make your hips ache even though the uterus is the organ going through its monthly cycle. The pain is real and surprisingly common, yet it rarely gets discussed as a standalone symptom because it tends to be lumped in with general “period pain.” The mechanisms behind it are more varied than most people realize, and in some cases premenstrual hip pain can point to conditions worth investigating further.

Prostaglandins and Referred Pain

The single biggest driver of menstrual-cycle pain is a group of hormone-like chemicals called prostaglandins. As progesterone drops in the days before your period, the uterine lining releases prostaglandins that trigger the muscle contractions needed to shed that lining. But prostaglandins do not stay neatly contained in the uterus. They enter nearby tissues and the bloodstream, sensitizing nerve endings throughout the pelvis. Because the nerves serving the uterus, hips, and lower back share overlapping pathways in the spinal cord, your brain can interpret uterine contractions as hip pain, lower-back ache, or deep thigh soreness. This phenomenon is called referred pain, and it explains why so many people feel period-related discomfort in places far from the uterus itself.

Research confirms that pain sensitivity doesn’t just spike during menstruation but actually begins climbing in the premenstrual phase. A study comparing women with painful periods to pain-free controls found that those with dysmenorrhea had lower pressure-pain thresholds at every body site tested, and across every phase of the cycle. During the premenstrual and menstrual phases those thresholds dropped even further, and the area of the body perceived as painful expanded.¹ In practical terms, this means your hips may not have a new problem in the premenstrual window. Your nervous system is simply amplifying signals that would normally fly under the radar.

Why Your Pain Threshold Drops Before Your Period

Prostaglandins are only part of the story. The sex hormones themselves directly influence how much pain you perceive. In the late luteal phase, progesterone climbs to its peak and then crashes. Research using cold-pressor testing in normally menstruating women showed that pain threshold was reduced during the late luteal phase compared with the late follicular phase, and the drop correlated with rising progesterone levels. Interestingly, estradiol appeared to buffer the effect: when estradiol was also elevated, the increased pain intensity linked to progesterone was reduced.² As both hormones plummet just before bleeding starts, that protective estradiol cushion disappears, leaving you in a temporary state of heightened pain sensitivity. Your hips, which bear a lot of mechanical load all day long, are easy targets.

Relaxin and Loosening Ligaments

There is also a structural component. Relaxin, a hormone most people associate with pregnancy, is released in smaller amounts during every menstrual cycle, peaking around ovulation and staying somewhat elevated into the luteal phase. Relaxin promotes collagen breakdown and activates enzymes that soften connective tissue, making ligaments more pliable. A narrative review on sacroiliac joint inflammation noted that relaxin and estradiol induced collagen breakdown, increased ligamentous laxity, and activated matrix metalloproteinases, and that cyclic relaxin peaks can produce micro-instability and chronic microtrauma in joints.³

The sacroiliac joints sit right where your spine meets your pelvis, and when they become even slightly unstable, the surrounding muscles have to compensate. That compensation often shows up as a deep, achy sensation in the hips or buttocks. Because the ligament loosening is cyclical, it can feel like the same hip injury keeps coming and going with your cycle. If you have ever noticed your hips feel “clunky” or less stable premenstrually, relaxin-driven laxity is a plausible explanation.

Premenstrual Inflammation Beyond the Uterus

Your immune system also shifts across the cycle. In the premenstrual phase, the balance between pro-inflammatory and anti-inflammatory signaling molecules tips toward inflammation. A study of healthy women found that those who reported premenstrual symptoms had significantly higher serum levels of pro-inflammatory cytokines, including TNF-alpha and IL-8, compared to symptom-free women. The imbalance was even more pronounced in women with low vitamin D levels.⁴ These inflammatory molecules circulate systemically, not just locally in the uterus, so joints and muscles throughout the body can feel the effect. If your hips already carry some low-grade wear from exercise, sitting posture, or a previous injury, the premenstrual inflammatory surge can temporarily push that wear into noticeable pain territory.

How Common Is Muscle and Joint Pain with PMS?

You are far from alone in experiencing this. In a study screening hundreds of women for premenstrual symptoms, physical complaints like breast tenderness, headache, bloating, and muscle or joint pain ranked among the most frequently reported symptoms, second only to fatigue and lack of energy.⁵ Those symptoms appeared not only in women meeting criteria for premenstrual dysphoric disorder but also in a large proportion of those with moderate PMS. The takeaway is that joint and muscle pain is a recognized, well-documented feature of the premenstrual phase, not a random coincidence.

When Cyclic Hip Pain Points to Endometriosis

Most premenstrual hip pain is caused by the hormonal and inflammatory mechanisms already described. But if your hip pain is severe, always appears on the same side, or shoots down your leg, it is worth considering endometriosis. Endometrial-like tissue can grow outside the uterus and, in some cases, directly involve the nerves of the pelvis. The nerves most commonly affected include the inferior hypogastric and lumbosacral plexuses, as well as the sciatic, pudendal, obturator, and femoral nerves.⁶

When endometriosis reaches the sciatic nerve, the result can mimic classic sciatica: pain radiating from the buttock down the back of the leg, numbness, or weakness, all worsening around menstruation. One published case described a woman with worsening right hip and buttock pain with severe exacerbation during menstruation, caused by a 3.5 cm endometriotic lesion on the pelvic segment of her right sciatic nerve.⁷ Cases like this are uncommon, but they illustrate why clinicians reviewing sciatica in women should routinely ask about cyclic patterns related to menstruation.⁸ If your hip or leg pain follows a strict monthly calendar, bring that pattern to your doctor’s attention.

Pelvic Congestion Syndrome and Hip Pain

Another underrecognized cause of cyclical hip pain is pelvic congestion syndrome, a condition in which the veins around the ovaries and uterus become dilated and pool blood. The resulting pressure and inflammation can radiate pain into the hips, and the symptoms tend to worsen premenstrually because hormonal changes further dilate those veins. In a case report, two patients originally diagnosed with hip osteoarthritis turned out to have pelvic congestion syndrome instead. After treatment with pelvic-vein embolization, the hip pain that had prompted the original osteoarthritis diagnosis disappeared almost immediately in both patients.⁹ One of the patients described the change as “miraculous.” Pelvic congestion syndrome is worth considering if hip pain is accompanied by a heavy, dragging sensation low in the pelvis that worsens with prolonged standing.

Hypermobility Syndromes and Hormonal Sensitivity

People with generalized joint hypermobility, particularly those with hypermobile Ehlers-Danlos syndrome, often report that their joint symptoms track with the menstrual cycle. A cohort study of 386 women with hypermobile Ehlers-Danlos syndrome found that a subset of women were sensitive to hormonal fluctuations, with more severe symptoms occurring during puberty, prior to menstruation, during the postpartum period, and on oral contraception.¹⁰ If your connective tissue is already looser than average, the cyclical relaxin and estrogen shifts discussed earlier hit harder. The hips, as large ball-and-socket joints that depend heavily on ligament and labral stability, are particularly vulnerable. Women with hypermobility who notice dramatic premenstrual hip flares may benefit from targeted strengthening and stabilization work rather than general stretching, which can make laxity worse.

What Hormonal Contraception Can and Cannot Do

Because much of premenstrual hip pain traces back to hormonal fluctuation, suppressing those fluctuations can help. Combined oral contraceptives, hormonal IUDs, and continuous-use pills all blunt the progesterone crash and prostaglandin surge that accompany a natural cycle. A survey of women with inflammatory arthritis found that some respondents specifically described pain in their sacroiliac joints and hips tied to their menstrual cycles, while one patient with inflammatory bowel disease-related arthritis noted much less hip pain after starting hormonal contraception.¹¹ Hormonal contraception is not a universal fix, and some people find their joint symptoms are unchanged or even worse on certain formulations. But if your hip pain tracks your cycle closely and is significantly affecting your quality of life, discussing hormonal options with a clinician is reasonable.

Practical Ways to Manage Premenstrual Hip Pain

For most people, premenstrual hip pain does not require a diagnosis hunt. It responds well to a few straightforward strategies.

Timed Anti-Inflammatory Use

Over-the-counter NSAIDs like ibuprofen work by blocking prostaglandin production, which directly addresses the root chemical driver. A small prospective study found that starting ibuprofen 24 hours before the expected onset of menstruation and continuing for four days produced significantly lower pain-intensity scores compared to untreated cycles.¹² The principle is straightforward: if you can predict when your pain window starts, pre-loading with an NSAID can blunt the prostaglandin surge before it takes hold. Naproxen is another option with a longer duration per dose, which some people find more convenient for overnight coverage.

Pelvic Floor and Core Exercise

Weak or tense pelvic-floor muscles can amplify hip and pelvic pain because those muscles connect directly to the hip bones and sacrum. Pelvic-floor physical therapy has shown benefits for female pelvic pain conditions, with improved pain scores and function compared to no intervention.¹³ A recent trial comparing Pilates alone to Pilates combined with pelvic-floor exercises found that both groups saw significant improvements in PMS-related pain, sleep quality, and quality of life, though the combined group showed somewhat larger improvements across PMS subscales.¹⁴ You do not need a formal diagnosis to start basic hip and core strengthening. Glute bridges, clamshells, and gentle hip circles are low-risk exercises that can improve pelvic stability and reduce the muscular compensation that translates into hip soreness.

Dietary Shifts

What you eat in the weeks before your period can influence how much prostaglandin your body produces. Research has linked diets high in omega-6 fatty acids to more severe menstrual pain. The mechanism is that omega-6 fats, particularly arachidonic acid, are the raw material for the most potent pain-producing prostaglandins. Omega-3 fatty acids compete with omega-6 in the same metabolic pathway, shifting production toward less inflammatory prostaglandins and reducing the overall inflammatory load.¹⁵ In practical terms, this means eating more fatty fish, walnuts, and flaxseed while cutting back on heavily processed fried foods and certain packaged snacks in the two weeks before your period could modestly reduce the prostaglandin-driven pain that radiates into your hips. The evidence base here is mostly observational, so the effect size varies from person to person, but the dietary shift carries essentially no risk.

When to See a Doctor

Premenstrual hip pain that responds to NSAIDs, eases within a day or two of your period starting, and does not limit your ability to walk or sleep is almost certainly a normal hormonal phenomenon. But certain patterns warrant a closer look:

One-sided pain: Pain that always appears on the same side and radiates down the leg can signal endometriosis involving a nerve, a labral tear aggravated by cyclical laxity, or an ovarian cyst pressing on pelvic structures.
Escalating severity: If the pain has been getting worse cycle after cycle over months or years, that progression is more consistent with endometriosis or pelvic congestion syndrome than with routine prostaglandin-driven discomfort.
Pain that doesn’t match your period timing: Pain appearing mid-cycle or persisting well into menstruation could point to a structural issue in the hip joint itself rather than a hormonal cause.
Heavy dragging pelvic pain with standing: Combined with hip pain, this pattern raises the possibility of pelvic venous congestion, which is treatable but often overlooked.

A clinician evaluating cyclical hip pain should consider pelvic imaging beyond a standard hip X-ray, particularly if the pain has a clear menstrual pattern. As one review noted, a thorough gynecological examination should be performed even when neurological findings are suggestive of a herniated disc, and the cyclic pattern of pain related to menses should be routinely asked about.⁸

Vitamin D and the Inflammatory Picture

One connection that often goes unmentioned in discussions of cyclical pain is vitamin D status. The study on cytokines and premenstrual symptoms found that the pro-inflammatory imbalance was especially pronounced in women with deficient vitamin D levels.⁴ Vitamin D plays a well-established role in modulating the immune system, and low levels are endemic in many populations, particularly during winter months. Getting your vitamin D checked is a simple blood test, and correcting a deficiency is cheap and safe. It is unlikely to eliminate premenstrual hip pain on its own, but it may lower the inflammatory background noise that makes the premenstrual window feel so much worse.