Most knots felt in the buttocks are myofascial trigger points, small, hyperirritable spots within taut bands of muscle that feel like hard nodules under the skin. The gluteal muscles, particularly the gluteus maximus and gluteus medius, are among the most common sites for these trigger points because of how much load they carry during sitting, walking, and running. But not every knot-like sensation in the buttocks is a muscle knot. Cysts, bursitis, injection-related lumps, and even referred pain from the spine can all produce a similar feeling, and telling them apart matters for getting the right treatment.
How Muscle Knots Form in the Gluteal Region
A myofascial trigger point develops when a small patch of muscle fibers contracts and refuses to release. The prevailing explanation centers on the motor endplate, the junction where a nerve signal tells a muscle fiber to contract. When something goes wrong at that junction, excess acetylcholine floods the gap between nerve and muscle, causing a cluster of fibers to lock into a sustained contraction. Over time, that contracted patch restricts local blood flow, builds up metabolic waste, and becomes tender to touch or pressure.
In the gluteus maximus specifically, researchers have mapped where trigger points tend to appear and found they line up almost perfectly with the spots where branches of the inferior gluteal nerve enter the muscle belly. That anatomical match suggests the nerve entry points are inherently vulnerable to the kind of endplate dysfunction that creates trigger points.1PubMed Central. Anatomical Basis of the Myofascial Trigger Points of the Gluteus Maximus Muscle These knots sit within a palpable taut band of muscle, which is what you or a clinician can feel when pressing into the buttock. The band itself is a strip of fibers held under tension by the contracted nodule at its center.2Acupuncture in Medicine. Myofascial Trigger Points: Pathophysiology and Correlation with Acupuncture Points
One feature that surprises many people is referred pain. A trigger point in your gluteus maximus does not always hurt right where it sits. Pressing on the knot might send a deep ache down the back of your thigh or into the lower back, making it easy to mistake for sciatica or a disc problem. This referral pattern is part of what makes gluteal trigger points tricky to diagnose without a hands-on examination.
Why Gluteal Trigger Points Are So Common
Myofascial pain is one of the most frequently seen soft-tissue pain conditions, and it can develop on its own or alongside other musculoskeletal problems.1PubMed Central. Anatomical Basis of the Myofascial Trigger Points of the Gluteus Maximus Muscle Several everyday habits make the buttocks especially susceptible. Prolonged sitting compresses the gluteal muscles against a chair, reducing blood flow to the tissue for hours at a time. Sudden increases in exercise, especially running or heavy squatting without adequate warm-up, can overload fibers that were not ready for the demand. Even sleeping on one side with a hip hiked up can keep the gluteus medius under sustained tension overnight.
Weakness plays a role too. When the gluteus maximus is weak relative to the demands placed on it, surrounding muscles compensate, and the overloaded fibers in the glutes are more likely to develop trigger points. A study on patients with sacroiliac joint dysfunction found significant gluteus maximus weakness on the affected side, and a targeted strengthening program led to measurable increases in strength and decreases in pain.3PubMed Central. Strengthening the Gluteus Maximus in Subjects with Sacroiliac Dysfunction The takeaway is that the knot is often a symptom of a muscle that is either overworked or underperforming relative to what you are asking of it.
The Piriformis Factor
Buried beneath the gluteus maximus lies the piriformis, a small, flat muscle that runs diagonally from the lower spine to the top of the thighbone. The sciatic nerve passes directly beneath it in most people, and in some it actually threads through the muscle itself. When the piriformis tightens, spasms, or develops its own trigger points, it can compress the sciatic nerve and create a condition known as piriformis syndrome.4PubMed. Piriformis Syndrome: A Narrative Review of the Anatomy, Diagnosis, and Treatment
Piriformis syndrome produces a deep, aching knot sensation in the buttock, often with shooting or tingling pain that radiates down the leg. Because it mimics the symptoms of a herniated disc pressing on a nerve root in the lumbar spine, it is frequently overlooked or misdiagnosed as lumbar radiculopathy.5PubMed Central. Piriformis Syndrome Is Often Overlooked as a Cause of Gluteal Pain and Sciatica: Diagnostic Challenges and the Role of Imaging One distinguishing clue is that the pain usually worsens with sitting, especially on hard surfaces, and often intensifies when you cross the affected leg over the other knee. If an MRI of the lumbar spine comes back clean but your buttock pain and leg symptoms persist, piriformis syndrome deserves a closer look.
When the Knot Starts in the Spine
Sometimes what feels like a buttock knot is actually pain being broadcast from an irritated nerve root in the lower back. Disc bulges, spinal stenosis, and other lumbar spine conditions can send pain into the buttocks even when the back itself feels fine. A descriptive study of lumbosacral nerve root irritation found that the most common referral pattern for the L3 through S1 levels was the buttock, posterior thigh, and posterior calf, and the pain frequently fell outside the classic textbook nerve maps.6PubMed. Induced lumbosacral radicular symptom referral patterns: a descriptive study
Referred spinal pain and gluteal trigger points often travel together. In a study comparing patients with radiculopathy to healthy volunteers, about three-quarters of the radiculopathy patients had identifiable gluteal trigger points, compared to under two percent of the healthy group. The side of the trigger point matched the side of the radicular pain roughly three-quarters of the time.7American Journal of Physical Medicine & Rehabilitation. Is There an Association Between Lumbosacral Radiculopathy and Painful Gluteal Trigger Points? This suggests that a nerve root problem in the spine can cause the gluteal muscles to tighten reactively, producing secondary trigger points that become their own source of pain. In these cases, treating only the buttock knot without addressing the spinal issue will give you temporary relief at best.
For people with spinal stenosis specifically, research indicates that the buttock pain is primarily radicular in nature rather than coming from degeneration of the facet joints in the spine.8PubMed Central. Is It Radiculopathy or Referred Pain? Buttock Pain in Spinal Stenosis Patients This distinction matters clinically because treatments targeting nerve root compression, such as epidural injections or decompression surgery, address the root cause rather than just the local symptom in the buttock.
Bursitis and Tendinopathy Around the Hip
Not all buttock pain with a localized tender spot comes from the muscle itself. Two common culprits sit near the bones rather than deep in the muscle belly.
Ischiogluteal bursitis develops when the bursa overlying the ischial tuberosity, the bony point you sit on, becomes inflamed. It often strikes people who sit for long hours on hard surfaces. In a retrospective study, the most common initial complaint was buttock pain, and tenderness directly over the ischial tuberosity was found in over nine out of ten patients. The good news is that the vast majority responded to conservative measures like rest, cushioning, and anti-inflammatory medication, with only a small fraction needing injection or surgery.9PubMed Central. Effects of Inflammatory Disease on Clinical Progression and Treatment of Ischiogluteal Bursitis
Gluteal tendinopathy, by contrast, involves the tendons of the gluteus medius or minimus where they attach near the greater trochanter on the outer hip. It is recognized as the primary driver of what used to be broadly labeled “greater trochanteric pain syndrome.” This condition most commonly affects women between their forties and sixties, producing chronic lateral hip pain and tenderness that can easily be mistaken for a deep buttock or hip knot. The average duration of symptoms before treatment is surprisingly long, roughly two years, suggesting many people live with it for a long time before seeking help.10PubMed Central. Treatment of Gluteal Tendinopathy: A Systematic Review and Stage-Adjusted Treatment Recommendation If your pain is more on the outside of the hip than deep in the center of the buttock and worsens when lying on that side, tendinopathy is worth considering.
Lumps That Are Not Muscle Knots
If you can feel a distinct, movable lump under the skin of the buttock rather than a diffuse tender area deep in the muscle, the cause is likely something other than a trigger point.
Epidermal cysts, also called epidermoid cysts, are the most common cysts found in the subcutaneous tissue. They are keratin-filled, slow-growing, and usually painless unless they become infected or rupture. Although they are more typical in other body areas, the buttocks are a recognized site.11PubMed Central. A Giant Epidermal Cyst in the Gluteal Region: A Case Report They can occasionally grow quite large if ignored, with case reports describing cysts that were present for decades.12PubMed. Surgical treatment for a giant epidermoid cyst on the buttock Lipomas, benign fatty lumps, are equally common in the subcutaneous layer and together with epidermal cysts account for the majority of benign subcutaneous masses seen in routine practice.13PubMed. Ultrasound Spot Diagnosis of Common Benign Subcutaneous Masses and Pseudomasses
Intramuscular injections in the gluteal region can also leave behind a palpable knot. Fat necrosis from an injection typically presents as a firm, encapsulated, mobile nodule under the skin.14PubMed Central. Fat necrosis: A neglected side effect of intramuscular injections Injection granulomas are another possibility and are more common in the buttocks than in the shoulder because the thicker subcutaneous fat layer in the gluteal region increases the chance that a needle intended for muscle ends up depositing medication into the fat instead.15PubMed Central. Injection granuloma mimicking soft tissue sarcoma following seasonal influenza vaccine administration These lumps can feel alarming but are almost always benign. The concern is that on imaging they can sometimes look worrisome enough to mimic a soft-tissue tumor, leading to unnecessary anxiety and sometimes biopsy.
Treatment Options for Gluteal Knots
For a standard myofascial trigger point in the buttock, treatment usually starts conservatively and escalates only if the knot persists. Here is what the evidence supports at each level:
- Self-care: Applying sustained pressure to the trigger point using a tennis ball, lacrosse ball, or foam roller against a wall or the floor can help release the taut band. Hold the pressure for 30 to 90 seconds per spot. Gentle stretching of the glutes and piriformis, combined with heat, often provides temporary relief. Regular movement breaks during long bouts of sitting address one of the most common aggravating factors.
- Manual therapy: A physical therapist can locate trigger points by palpation and apply ischemic compression, sustained pressure that temporarily reduces blood flow to the nodule and then allows a rebound of circulation when released. Both ischemic compression and dry needling have been shown to reduce pain sensitivity in gluteus medius trigger points in patients with low back pain, though dry needling produced somewhat larger improvements that lasted longer in a short-term comparison.16PubMed Central. Effectiveness of Dry Needling and Ischemic Trigger Point Compression in the Gluteus Medius in Patients with Non-Specific Low Back Pain
- Dry needling: A thin, solid needle is inserted directly into the trigger point with the goal of eliciting a local twitch response, a brief, involuntary contraction of the taut band that signals it is releasing.17PubMed Central. Effects of Trigger Point Dry Needling on Strength Measurements and Activation Levels of the Gluteus Medius The sensation is uncomfortable but brief. Multiple passes at different angles are common in a single session.
- Trigger point injections: When dry needling alone is insufficient, a clinician can inject the trigger point with a local anesthetic, corticosteroid, or botulinum toxin. These injections may be performed with or without imaging guidance like ultrasound, though guided injections are generally recommended for better accuracy and safety.18PubMed Central. Trigger Point Injections
- Strengthening: Treating the knot without addressing the weakness or imbalance that caused it is a recipe for recurrence. Adding gluteal and hip muscle strengthening to a rehabilitation program has been shown to improve outcomes in patients with chronic low back pain beyond what spinal stabilization exercises alone can achieve.19PubMed Central. The effects of gluteus muscle strengthening exercise and lumbar stabilization exercise on lumbar muscle strength and balance in chronic low back pain patients
For piriformis syndrome, the approach overlaps heavily with trigger point treatment: stretching, manual therapy, and sometimes injection directly into the piriformis under image guidance. For bursitis, the focus shifts to reducing inflammation through rest, cushioning, and anti-inflammatories. Tendinopathy is best managed with a progressive loading program rather than rest alone, since tendons need controlled stress to repair.
Biomechanical Patterns That Set You Up
If you keep getting knots in the same buttock, it is worth looking further down the chain. Foot mechanics affect how the pelvis moves during walking and running. Pronated feet, which roll inward excessively, have been shown to alter pelvic position and increase internal rotation at the hip during the loading phase of gait.20PubMed Central. Foot pronation affects pelvic motion during the loading response phase of gait These are small angular changes measured in degrees, but over thousands of steps per day, they alter how the gluteal muscles absorb and distribute force. If one side is consistently working harder or at a mechanical disadvantage, it is more likely to develop trigger points.
The broader evolutionary context is interesting here too. Human gluteal muscles, particularly the gluteus maximus, evolved to support the energy-efficient bipedal walking and long-distance running that separates us from other primates. That adaptation came at a trade-off: we gained endurance but lost some of the raw power that would support activities like climbing or sprinting.21PubMed Central. Evolution of the human hip. Part 2: muscling the double extension In modern life, where many people sit for the majority of the day and then ask their glutes to perform sudden bursts of activity, the mismatch between what these muscles were designed for and how we actually use them may help explain why gluteal pain is so widespread.
When to Get a Buttock Knot Checked
Most gluteal trigger points, even persistent ones, are benign and resolve with appropriate treatment. But a few features warrant a visit to a clinician rather than more time on a foam roller:
- Rapid growth: A lump that grows noticeably over weeks rather than staying the same size needs imaging to rule out something more serious than a cyst or lipoma.
- Night pain: Trigger points usually calm down at rest. A deep buttock ache that wakes you at night, particularly if it does not respond to position changes, may indicate a bone or joint problem rather than a muscle issue.
- Neurological symptoms: Progressive numbness, weakness in the foot, or difficulty controlling the bladder or bowel alongside buttock pain suggests nerve compromise that goes beyond a simple trigger point or piriformis spasm.
- Post-injection lumps: A firm nodule that appears at the site of a previous intramuscular injection and persists for more than a few weeks should be evaluated, since injection granulomas can occasionally mimic soft-tissue tumors on imaging and may need a biopsy to confirm they are benign.15PubMed Central. Injection granuloma mimicking soft tissue sarcoma following seasonal influenza vaccine administration
- Systemic symptoms: Unexplained weight loss, fever, or fatigue alongside a new lump in the buttock warrants prompt medical evaluation.
For the vast majority of people, the knot in the buttock is a trigger point born from too much sitting, too little strengthening, or a movement pattern that loads one side more than the other. Addressing those root causes, not just chasing the knot itself, is what keeps it from coming back.