Lower Back Pain
Chronic lower back pain—especially pain that flares around your period—can be a sign of endometriosis and/or adenomyosis, not “just normal cramps.” Understanding why it happens can help you seek the right evaluation and relief.
Overview
Lower back pain is a common but often overlooked symptom of both endometriosis and adenomyosis. For some people it feels like a deep ache across the beltline; for others it’s sharp, pulling, or burning pain that starts in the pelvis and “wraps” into the lower back. Many notice a cyclical pattern—worse before or during bleeding—but it can also become persistent over time.
With endometriosis, endometrial-like tissue grows outside the uterus and can trigger inflammation, scarring (adhesions), and irritation of nearby nerves and muscles. Disease behind the uterus (often in the back of the pelvis), on the uterosacral ligaments, or deeper in the pelvis can refer pain into the low back because pelvic nerves and back structures share interconnected pain pathways.
With adenomyosis, tissue similar to endometrium grows into the muscular wall of the uterus. The uterus may become inflamed, enlarged, and more tender—especially during the menstrual cycle. That increased uterine pressure and cramping can radiate into the lower back and pelvis, and some patients describe it as “labor-like” pain that also hits the back.
Lower back pain can also come from other conditions (disc disease, muscle strain, kidney issues, fibroids, pelvic floor dysfunction, or bladder/bowel disorders), which is why symptom pattern matters. A clue that points toward endometriosis/adenomyosis is pain that’s cyclical, linked with pelvic symptoms, or not explained by spine imaging. A thorough workup through a specialist-focused process like Evaluation & Diagnosis can help clarify the cause.
When back pain is driven by pelvic disease, it can affect work, sleep, exercise, sitting tolerance, and intimacy—often leading to avoidance, deconditioning, and frustration after being told “everything looks normal.” If this is your experience, you deserve a deeper look and a plan that addresses root causes, not only temporary suppression.
What It Feels Like
People often describe endometriosis/adenomyosis-related lower back pain as deep, heavy, and hard to “stretch out.” It may feel like a constant ache near the sacrum/tailbone area, pressure across the low back, or stabbing pain that comes in waves—sometimes alongside pelvic cramping. Some notice pain after standing for long periods, after bowel movements, or after intercourse, when pelvic muscles and inflamed tissues are more reactive.
A common pattern is cyclical flares: back pain ramps up in the days before bleeding, peaks during menstruation, and improves afterward. Others feel it around ovulation or have near-daily pain with periodic “spikes.” Adenomyosis-related pain is often described as intense uterine cramping with back radiation, while endometriosis may feel more “tethering” or pulling—especially if adhesions restrict normal organ movement.
Variability is normal. Some people feel back pain on one side; others feel it centrally. It can coexist with leg pain, hip pain, or buttock pain, especially when nerves are sensitized. Over time, repeated inflammation can contribute to central sensitization (the nervous system becomes more reactive), meaning pain may persist even outside the period window and can be triggered by stress, lack of sleep, or physical strain.
How Common Is It?
Lower back pain is widely reported in people with endometriosis and adenomyosis, although exact rates vary depending on how studies define “back pain” and which populations are surveyed (general community vs. specialty clinics). In clinical practice, it’s common to see back pain listed alongside classic symptoms like painful periods and pelvic pain—especially when symptoms worsen around menstruation.
Importantly, symptom severity does not always match “stage” of endometriosis. Some patients with minimal-appearing disease can have significant back pain, while others with extensive disease have less pain. Location can matter: disease in the posterior pelvis or deep infiltrating areas may be more likely to produce referred back pain, but there’s no single rule.
For adenomyosis, back pain often travels with heavy bleeding and strong cramping. Because adenomyosis and endometriosis frequently co-occur, overlapping mechanisms can make back pain more persistent and harder to control unless both conditions are considered during evaluation.
Causes & Contributing Factors
In endometriosis, lesions can provoke chronic inflammation, releasing chemicals that irritate pain fibers and make nerves more sensitive. Over time, inflammation can lead to scarring and adhesions that restrict how pelvic organs glide, creating a pulling sensation that’s often felt in the lower back—especially with movement, bowel function, or during the menstrual cycle.
In adenomyosis, the uterine muscle becomes infiltrated and inflamed. The uterus may contract more forcefully and irregularly, and the uterine wall can thicken—both of which can increase pelvic pressure and trigger pain that radiates to the back. Many patients notice the back pain is most intense during heavy bleeding days.
Nerve and muscle involvement can amplify the symptom. Pelvic floor muscles may tighten protectively in response to chronic pelvic pain, which can create secondary low back pain and hip tension. If nerves are irritated or sensitized, pain may feel burning, electric, or may radiate into the buttocks or legs.
Flares are commonly worsened by factors such as prolonged sitting, constipation/straining, poor sleep, high stress, and high inflammation states. Tracking patterns—what improves it (heat, rest, anti-inflammatory meds, gentle movement) and what worsens it—can provide important clues for your clinician and help tailor treatment.
Treatment Options
Treatment depends on whether your back pain is primarily driven by endometriosis, adenomyosis, pelvic floor dysfunction, another condition—or a combination. Many patients benefit from a layered approach: symptom relief now plus a plan to address root causes through expert evaluation (see Evaluation & Diagnosis).
Medical management may include nonsteroidal anti-inflammatory drugs (NSAIDs) when appropriate, neuropathic pain medications in select cases, and targeted strategies from our Pain Management approach. If symptoms are clearly cyclical, hormonal suppression (such as continuous combined hormonal contraception, progestin therapy, or other options) may reduce bleeding-related inflammation and cramping; learn more at Hormonal Therapy. These options can be helpful for symptom control, but they don’t remove endometriosis lesions.
When endometriosis is suspected or confirmed and symptoms are persistent, excision surgery is considered the gold standard because it aims to remove disease at the root rather than simply burning the surface. Advanced, minimally invasive approaches—especially for deep or complex disease—can be explored through Surgery & Advanced Excision and our broader our services. If adenomyosis is a major contributor, treatment may range from medication to uterus-sparing procedures in select situations, and for some people hysterectomy is considered; decisions are individualized and should account for fertility goals.
Pelvic floor physical therapy can be a game-changer when muscle guarding contributes to back pain—especially if you have pain with sitting, intercourse, bowel movements, or urinary symptoms. See related education in our Pelvic Floor PT and Pelvic Floor Dysfunction resources. Integrative options like heat, TENS, gentle mobility, acupuncture, and anti-inflammatory nutrition can complement medical/surgical care; explore Integrative Medicine & Lifestyle Care and At-Home Remedies.
What to expect: some people improve significantly with hormonal and supportive care, especially when symptoms are strongly cycle-linked. Others need a surgical plan—particularly if pain is progressive, disabling, or associated with deep disease. If you’re looking for expert guidance, you can learn about Dr. Steven Vasilev and how our team approaches complex pelvic pain with precision and compassion.
When to Seek Help
Seek urgent care right away if lower back pain comes with fever, chills, fainting, severe one-sided flank pain, vomiting that won’t stop, new weakness/numbness, loss of bowel/bladder control, or if you might be pregnant and have severe pain or heavy bleeding. These can signal conditions that require immediate evaluation.
Schedule a specialist appointment if your back pain is cyclical, lasts more than a few months, interferes with work/school/sleep, or occurs with symptoms like pelvic pain, painful periods, heavy bleeding, bowel/bladder pain, pain with intercourse, or infertility. Because endometriosis and adenomyosis are frequently missed for years, early, expert evaluation matters—especially if you’ve been told imaging is “normal” but your pain continues.
To make your visit more productive, bring a brief symptom timeline: when it started, cycle timing, what makes it better/worse, any GI/urinary/sex pain symptoms, and treatments you’ve tried. If you’re ready for a deeper assessment and an individualized plan, schedule a consultation or contact us.
Frequently Asked Questions
Is it normal to feel broken from endometriosis pain during sex?
Yes—what you’re describing is incredibly common, and it doesn’t mean you’re broken. Pain with sex (during, after, or specifically after orgasm) can be a direct symptom of endometriosis, and it can also be reinforced over time by pelvic floor guarding and the nervous system becoming more sensitive to pain signals. When your body learns to anticipate pain, it can change arousal, lubrication, and the sense of safety around intimacy, which can make the emotional impact feel just as heavy as the physical pain.
We also want you to know that sexual distress can linger even when other symptoms improve, because it’s not only about the lesions—it’s about inflammation, adhesions that restrict normal movement, muscle tension, and how long you’ve had to cope. The good news is that this is treatable in a comprehensive way: we focus on identifying and addressing the underlying pain drivers (including disease that may benefit from excision) while also supporting pelvic floor and nervous system recovery so sex can feel safe again. If this is affecting your relationship, confidence, or quality of life, reach out to schedule a consultation—our team can help you map out why it hurts and what a realistic path forward looks like.
Can endometriosis cause kidney problems?
Yes—endometriosis can affect the kidneys indirectly when it involves the ureters (the tubes that drain urine from the kidneys to the bladder). Deep endometriosis can grow on or around a ureter and cause narrowing or blockage, which can lead to urine backing up into the kidney (hydronephrosis). Over time, that pressure can threaten kidney function.
What makes this especially tricky is that ureter involvement can be “silent”—some people have minimal urinary symptoms, or symptoms that don’t feel like a kidney issue at all, until imaging shows swelling of a kidney. When urinary symptoms do happen, they may look more like bladder irritation (burning, pressure, painful urination) that worsens cyclically rather than obvious signs like visible blood in the urine.
If you have known or suspected deep endometriosis, new urinary symptoms, recurrent “UTI” complaints with negative cultures, flank/back pain, or imaging that mentions hydronephrosis, our team takes that seriously and evaluates the full urinary tract—not just the pelvis. We can help map where disease may be affecting the bladder and ureters and discuss what treatment can look like, including minimally invasive excision when appropriate—reach out to schedule a consultation.
Is endometriosis linked to hypermobility (EDS/hEDS)?
Yes—there does appear to be meaningful overlap between endometriosis and joint hypermobility syndromes like hEDS/EDS, but the research is still evolving and it’s not accurate to say one definitively “causes” the other. What we see clinically is that patients with hypermobility often have more complex pelvic pain presentations, sometimes with heightened nerve sensitivity, pelvic floor muscle overactivity, and multi-system symptoms that can make endometriosis harder to recognize and harder to calm down.
One reason this overlap is getting attention is the way connective tissue differences and immune inflammation can intersect with pain processing. Hypermobility is also frequently discussed alongside related patterns like dysautonomia/POTS and mast-cell–type inflammation, which may help explain flares that seem disproportionate, widespread, or triggered by stress, hormones, foods, or environmental exposures.
If you’re hypermobile (or suspect you are) and also dealing with symptoms that fit endometriosis, we take that “whole picture” seriously. Our team can help you sort out what’s coming from endometriosis versus overlapping drivers, and build a plan that may include precise diagnosis, minimally invasive excision when appropriate, and coordinated integrative support so your recovery and long-term symptom control are set up for success.
What if I can’t take NSAIDs for endometriosis pain?
When you can’t take NSAIDs, it often exposes an important truth about endometriosis care: anti‑inflammatories may blunt symptoms, but they don’t treat the disease itself. Without NSAIDs, some people notice that flares feel more intense or last longer—especially if pain has become “wired in” over time through nervous system sensitization (meaning the body learns to amplify pain signals). That doesn’t mean you’re out of options; it means we need a more structured plan than a single medication.
In our practice, we typically think in layers: addressing pain drivers (inflammatory, hormonal, nerve-related, and musculoskeletal) while also evaluating whether endometriosis or adenomyosis itself needs definitive treatment. Non‑medication tools can play a bigger role here—especially pelvic floor therapy for muscle guarding and pelvic nerve irritation, and nervous-system-focused strategies that reduce pain amplification over time. If symptoms are escalating or you’re relying on workarounds because NSAIDs aren’t safe for you, that’s often the point when it’s worth stepping back and building a comprehensive plan with our team, including discussion of excision surgery when indicated and coordinated support to improve day-to-day function.
Why does endometriosis cause tailbone pain?
Tailbone (coccyx) pain can happen with endometriosis even though the coccyx isn’t a reproductive organ. One common reason is pelvic floor dysfunction: ongoing pelvic inflammation and pain can “train” the pelvic floor muscles to stay clenched and overactive, and those muscles attach near the tailbone and can refer pain into the coccyx, low back, hips, and rectum. Over time, nerve sensitization can also develop, meaning the nervous system becomes better at producing pain signals—so tailbone discomfort can persist or flare even when the original trigger seems small.
In other cases, tailbone pain is part of a broader endometriosis pain pattern that overlaps with bowel symptoms, deep pelvic pressure, or pain with sitting, and it may reflect how your muscles, fascia, and nerves are interacting—not just where endometriosis lesions are visible. That’s why effective care often looks beyond the lesions alone and includes a careful evaluation of pelvic floor tone, myofascial trigger points, posture/movement patterns, and coexisting conditions like adenomyosis.
If tailbone pain is one of your dominant symptoms, our team can help you map out likely pain drivers and build a plan that may include expert excision surgery when indicated and pelvic floor therapy to address muscle guarding and sensitization. If you’d like, reach out to schedule a consultation so we can review your symptoms in detail and discuss the next best steps.
Sciatica vs endometriosis nerve pain: what’s the difference?
Sciatica is a symptom pattern—typically buttock pain that can shoot down the back of the leg—most often caused by irritation or compression of nerve roots in the lower spine. Endometriosis-related “sciatic” pain can look similar, but the driver is different: endometriosis may involve or compress the sciatic nerve in the deep pelvis (often near the sciatic notch), or it may create pelvic inflammation and scarring that irritates nearby nerves and pelvic floor muscles and refers pain down the leg.
A useful clue is timing and context. Endometriosis nerve pain may be cyclical (worse before or during a period and lingering after), and it often travels with other pelvic symptoms like painful periods, pain with sex, bowel or bladder pain, or deep pelvic floor tenderness—though it can also be non-cyclical in advanced disease. Sciatic endometriosis can also come with neurologic-type symptoms such as tingling, weakness, gait changes, or even foot drop, which we take seriously because prolonged nerve irritation can lead to lasting damage.
When we evaluate leg/sciatic pain with a possible endometriosis connection, we look at the full pattern of symptoms, exam findings, and whether imaging like MRI can clarify if there’s a lesion or compression in the pelvic sidewall (recognizing that imaging doesn’t always “rule out” endometriosis). If your sciatica has a menstrual pattern or hasn’t been explained by spine findings, our team can help you sort out whether endometriosis, pelvic floor involvement, or another condition is contributing—and what next steps make the most sense.
Why does chronic endometriosis pain feel different than acute pain?
Chronic endometriosis pain often feels different from acute pain because it’s usually driven by more than a single “injury signal.” Acute pain tends to be tied to a specific trigger—like a sudden inflammatory flare—so it can feel sharp, intense, and more clearly linked to timing (often around periods). Over time, ongoing irritation from lesions, inflammation, adhesions, and tissue changes can keep pain signals firing and change how the body processes them. That’s why chronic pain can feel more constant, deeper, more diffuse, or harder to predict.
Another major reason is central sensitization, where the brain and spinal cord become more sensitive after repeated pain input. In this state, normal sensations (pressure, fullness, movement, pelvic exams, even clothing) may be interpreted as painful, and pain can spread beyond the original pelvic area. This doesn’t mean the pain is “in your head”—it means the nervous system has learned to stay on high alert and can be slow to turn back down.
In our care, we separate treating the disease (targeting the lesions themselves) from managing the pain system that may have adapted over time. For many patients, lasting relief requires addressing both—through precise evaluation of lesion-related pain drivers and a tailored plan for chronic pain mechanisms. If your pain has shifted from cyclical to persistent or widespread, reach out to our team; we can help you make sense of your pattern and map out next steps.
Why does endometriosis feel like twisting pain?
That “twisting” or “wringing” sensation is a very common way patients describe endometriosis pain, and it often reflects more than one pain driver happening at once. Endometriosis lesions can behave like active, inflamed wounds, and the body may respond by laying down scar-like tissue (fibrosis) and adhesions that can tether organs together. When structures that are meant to glide—uterus, ovaries, bowel, bladder—are restricted, certain movements, bowel activity, sex, or even normal uterine cramping can feel like something is pulling or twisting inside you.
Twisting pain can also come from nerve involvement and pain-system “upshifts” over time. Ongoing pelvic pain signals can sensitize nearby nerves and, in some people, lead to central sensitization—where the nervous system starts interpreting normal sensations as painful and spreads pain beyond the original site. On top of that, pelvic floor muscles often tighten protectively around chronic pelvic pain, and that muscular guarding can intensify the gripping/twisting feeling.
If you’re noticing this sensation—especially if it’s getting more constant, feels tied to bowel/bladder function, or isn’t matching what imaging shows—our team can help you sort out whether adhesions/deep disease, pelvic floor dysfunction, or nervous system sensitization is most likely driving it. From there, we can map out a plan that treats the disease when indicated (often with expert excision) while also addressing the pain pathways that can keep symptoms going even after treatment.
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