Enthesitis is inflammation where tendons or ligaments attach to bone, causing deep, localized pain that may be mechanical or inflammatory.
This video explains how enthesitis may cause tendon attachment pain, heel pain, joint-adjacent pain, and inflammatory symptoms.
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Hi, I’m Dr. Jason Siefferman., medical director at Manhattan Pain Medicine. Psoriasis is an autoimmune inflammatory condition which we generally think of as affecting the skin. Most people don’t realize that it also has systemic effects. Some of those systemic effects can include arthritis. It can affect small joints in the body, including the TMJ joint and small finger joints, or even the elbow. And it also can affect connective tissue. The connective tissue may include ligaments and tendons, and specifically where those ligaments and tendons attach to bone. This is called enthesitis. This is similar to a tendinitis, but it’s very specific to where these structures attach to the periosteum of the bone. And again, this is an autoimmune inflammatory condition. It is not an overuse injury. Overuse injuries can trigger a psoriatic response in someone with psoriasis, and it will compound the inflammatory pain, but it is distinct from the overuse situation. Treatment of psoriatic arthritis, psoriatic enthesitis, is treatment for the autoimmune condition, and that is done by a rheumatologist.
Enthesitis is inflammation at the enthesis, where a tendon, ligament, or joint capsule structure attaches to bone. Pain may feel deep, localized, and close to a joint, even though the problem may not be inside the joint itself. Enthesitis can affect the Achilles tendon, heel, plantar fascia, elbow, knee, hip, pelvis, shoulder, or spine-related attachment sites.
It may be related to mechanical stress, overuse, trauma, hypermobility, or inflammatory arthritis such as psoriatic arthritis or spondyloarthritis. Because it can resemble tendonitis, bursitis, plantar fasciitis, gout, or referred pain, accurate diagnosis matters before treatment.
At Manhattan Pain Medicine, evaluation begins by identifying whether pain is coming from the enthesis, tendon, ligament, bursa, joint, nerve, spine, or an inflammatory condition.
For patients looking for enthesitis treatment in Manhattan, MPM uses a diagnosis-first approach that may include physical examination, movement assessment, diagnostic ultrasound, imaging review, and coordination with rheumatology when systemic inflammatory arthritis is suspected.
Care may include activity modification, medication management, rehabilitation planning, ultrasound-guided injections when appropriate, and coordinated treatment for psoriatic arthritis, spondyloarthritis, or other autoimmune-related conditions.
Enthesitis can be overlooked because it often feels like tendonitis, plantar fasciitis, bursitis, joint pain, or an overuse injury. A patient may feel pain at the back of the heel, under the heel, outside the elbow, around the knee, near the hip, or close to the pelvis or shoulder. The painful area may be tender to pressure and worse with walking, gripping, climbing stairs, running, or repeated loading.
The distinction matters because mechanical tendon irritation and inflammatory enthesitis may require different care. Mechanical pain may improve with load modification, rehabilitation, and movement retraining. Enthesitis related to psoriatic arthritis, spondyloarthritis, gout, or another inflammatory disease may require coordinated medical treatment. MPM evaluates both possibilities before recommending injections, medications, or specialist referral.
Enthesitis fits within MPM’s Autoimmune and Inflammatory and Musculoskeletal issues Zones of Expertise. This matters because tendon attachment pain may be caused by local mechanical stress, but it can also be a sign of systemic inflammatory arthritis. A patient with Achilles pain, heel pain, elbow pain, knee pain, hip pain, or pelvic attachment pain may need evaluation beyond the painful site itself.
MPM uses the Zones of Expertise framework to determine whether symptoms appear mechanical, inflammatory, autoimmune-related, hypermobility-related, neuropathic, or referred from the spine. For some patients, the priority is targeted musculoskeletal care. For others, enthesitis may be part of psoriatic arthritis, spondyloarthritis, gout, or another inflammatory condition that requires coordinated specialist management.
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The best care I've received as a chronic pain patient. I traveled from out of state to visit Manhattan Pain Medicine because I could not find knowledgeable doctors in my hometown for my hypermobility, and Ehlers-Danlos syndrome symptoms and comorbidities. Let me tell you, it was worth every travel e...
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The staff was friendly and helpful. Dr. Siefferman was thoughtful, listened, asked questions and proposed simple safe ways to come to further conclusions regarding my pain and discomfort. The office staff including Dr. Siefferman is responsive even after the initial in-person visit. Very pleased.
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Enthesitis is inflammation at the enthesis, which is the area where a tendon, ligament, or joint capsule structure attaches to bone. This area can become painful when it is irritated by mechanical stress, overuse, trauma, or inflammation from an underlying condition. Enthesitis is commonly discussed in relation to psoriatic arthritis and spondyloarthritis, but tendon attachment pain can have several causes. Because the pain often occurs near a joint, it may be mistaken for arthritis, tendonitis, bursitis, plantar fasciitis, or injury. A careful evaluation helps identify the true pain generator.
Enthesitis often feels like deep, localized pain near a joint or tendon attachment. The area may be tender to pressure and may hurt with walking, gripping, climbing stairs, running, pushing off the foot, or loading the affected structure. Some patients describe heel pain, Achilles insertion pain, plantar fascia pain, elbow pain, knee pain, hip pain, or pelvic attachment pain. If enthesitis is inflammatory, symptoms may be worse in the morning, involve multiple sites, or occur with joint swelling, back pain, psoriasis, fatigue, or other systemic symptoms.
Enthesitis can occur anywhere tendons or ligaments attach to bone. Common sites include the Achilles tendon, heel, plantar fascia, elbow, knee, hip, pelvis, shoulder, and spine-related attachment areas. Heel pain is especially common because the Achilles tendon and plantar fascia both attach in areas that absorb significant force during walking and standing. Enthesitis can also occur around the ribs, chest wall, or pelvis in some inflammatory arthritis patterns. Location matters because treatment and injection risk vary by site.
Enthesitis may be caused by inflammatory arthritis, psoriatic arthritis, spondyloarthritis, reactive arthritis, gout, mechanical overload, repetitive stress, trauma, altered movement mechanics, or hypermobility-related strain. In some patients, a single painful enthesis is related to local tendon or ligament stress. In others, multiple painful attachment sites may suggest a systemic inflammatory condition. This distinction is important because mechanical enthesitis may be treated differently from inflammatory enthesitis. MPM evaluates symptoms, examination findings, imaging, and systemic clues before recommending a treatment pathway.
Enthesitis diagnosis usually begins with a detailed history and physical examination. A clinician may evaluate the exact pain location, tenderness at the tendon or ligament insertion, activity triggers, morning stiffness, swelling, range of motion, gait, strength, and signs of inflammatory arthritis. Diagnostic ultrasound may help assess inflammatory or structural changes at the enthesis, including tendon thickening, erosions, enthesophytes, fluid, or soft tissue changes. MRI may be considered in selected cases. Bloodwork or rheumatology evaluation may be needed when psoriatic arthritis, spondyloarthritis, gout, or another inflammatory condition is suspected.
No. Tendonitis refers to irritation or inflammation within a tendon. Enthesitis refers to inflammation where a tendon, ligament, or capsule attaches to bone. The two can feel similar, and both may cause pain with activity or pressure. However, enthesitis may be more closely associated with inflammatory arthritis patterns, especially when symptoms occur at multiple attachment sites or alongside psoriasis, inflammatory back pain, joint swelling, or morning stiffness. Distinguishing enthesitis from tendonitis, bursitis, plantar fasciitis, gout, injury, or referred pain helps guide the right treatment.
Treatment depends on the cause, location, and severity. Options may include activity modification, rest from aggravating loads, physical therapy, movement retraining, NSAIDs when medically appropriate, medication management, and treatment of the underlying inflammatory condition when present. Steroid injections may be considered in selected cases, but injections near tendons or entheses require caution because tissue integrity and rupture risk matter. When enthesitis is part of psoriatic arthritis or spondyloarthritis, rheumatology-directed medications such as biologics or other systemic therapies may be considered. Not every patient needs injections or biologics.
You should consider evaluation if heel pain, Achilles pain, plantar fascia pain, elbow pain, knee pain, hip pain, or other tendon attachment pain persists despite routine care, limits walking or function, or keeps returning. Evaluation is especially important if pain occurs with swelling, prolonged morning stiffness, psoriasis, inflammatory back pain, multiple painful sites, gout history, numbness, weakness, fever, or symptoms that suggest autoimmune disease. Sudden severe pain, suspected tendon rupture, inability to bear weight, or signs of infection should be addressed promptly.
Before care begins, our team helps patients understand the practical side of treatment, including insurance verification, out-of-network benefits, cost-share estimates, self-pay options, and billing questions. We believe patients should have as much clarity as possible before moving forward.
Enthesitis is inflammation at the enthesis, the point where a tendon, ligament, or joint capsule structure attaches to bone. This small attachment area absorbs force every time a person walks, grips, pushes, pulls, climbs stairs, or loads a joint. When the enthesis becomes irritated or inflamed, pain can feel deep, localized, and close to a joint.
Patients often describe pain “near the joint” rather than inside the joint. For example, Achilles enthesitis may cause pain at the back of the heel. Plantar fascia enthesitis may cause pain under the heel. Enthesitis around the elbow, knee, hip, pelvis, shoulder, or spine can feel like tendonitis, bursitis, arthritis, or overuse. This is why accurate diagnosis matters.
Enthesitis usually causes pain at a tendon or ligament attachment site. The area may be tender to touch, painful with pressure, or worse during activity. Walking may aggravate heel or Achilles involvement. Gripping may aggravate elbow symptoms. Climbing stairs may aggravate knee or hip attachment pain. Some patients feel stiff after rest or notice symptoms that are worse in the morning.
When enthesitis is part of an inflammatory arthritis pattern, patients may have more than one painful site. They may also have psoriasis, inflammatory back pain, swollen joints, fatigue, eye inflammation, bowel symptoms, or a family history of autoimmune disease. Enthesitis can occur without psoriasis, but the presence of psoriasis or inflammatory back pain may change the diagnostic pathway.
Enthesitis can be mechanical, inflammatory, or mixed. Mechanical enthesitis may develop from repetitive load, training changes, poor recovery, altered biomechanics, foot structure, tendon overload, prior injury, or hypermobility-related strain. Inflammatory enthesitis may occur with psoriatic arthritis, spondyloarthritis, reactive arthritis, gout, or other autoimmune-related conditions.
This distinction is important because treatment is different. Mechanical overload may improve with load modification, strengthening, movement retraining, footwear changes, or physical therapy. Inflammatory enthesitis may require systemic treatment guided by rheumatology, especially when multiple sites are involved or symptoms suggest psoriatic arthritis or spondyloarthritis.
Enthesitis affects the tendon or ligament insertion at the bone. Tendonitis affects the tendon itself. Bursitis affects a fluid-filled cushion near a joint or tendon. Arthritis affects the joint. These structures are close together, so symptoms can overlap.
Heel pain is a common example. Pain under the heel may be described as plantar fasciitis, but the source may involve the plantar fascia insertion. Pain at the back of the heel may involve the Achilles tendon insertion, a bursa, the tendon itself, or bone irritation. Knee, hip, elbow, and shoulder pain can also involve multiple structures. A diagnosis-first evaluation helps identify which structure is most likely responsible.
MPM begins with a careful history and physical examination. The evaluation looks at the exact pain location, activity triggers, tenderness, swelling, stiffness, gait, strength, joint mobility, spine referral patterns, nerve symptoms, and signs of systemic inflammation. The team also reviews prior imaging, bloodwork, rheumatology notes, medications, injections, and response to previous treatment.
Diagnostic ultrasound may be useful when clinically appropriate. Ultrasound can help evaluate tendon thickening, erosions, enthesophytes, fluid, inflammation, and structural changes. It may also help guide injections when an injection is appropriate. MRI may be considered in selected cases, especially when deeper structures are involved or when the diagnosis remains unclear.
Treatment depends on the cause. Mechanical enthesitis may be managed with activity modification, temporary load reduction, physical therapy, strength work, mobility support, footwear changes, and gradual return to activity. Medication management may include NSAIDs when medically appropriate. If pain is related to muscle guarding or surrounding soft tissue irritation, additional musculoskeletal treatments may be considered.
Steroid injections may be considered in selected cases, but they require caution near tendons and entheses. The decision depends on diagnosis, location, tissue integrity, rupture risk, severity, and imaging findings. Ultrasound guidance may help with needle placement when injection is considered. Injections should not be presented as the default treatment for enthesitis.
When enthesitis is part of psoriatic arthritis, spondyloarthritis, or another inflammatory arthritis, treatment may require rheumatology-directed care. DMARDs and biologics may be considered for systemic inflammatory disease, but they require specialist oversight and monitoring. Pain treatment alone does not control systemic inflammatory arthritis.
Enthesitis can become persistent when the underlying driver is not addressed. Mechanical overload, poor tissue recovery, ongoing inflammation, hypermobility, altered movement patterns, nerve sensitivity, or repeated flares can all contribute. Some patients also develop fear of movement, deconditioning, or chronic pain sensitization after prolonged symptoms.
MPM evaluates whether pain appears mechanical, inflammatory, neuropathic, referred, or multifactorial. This helps guide care beyond the painful site itself. For some patients, the plan may focus on rehabilitation and load management. For others, it may require coordination with rheumatology, diagnostic ultrasound, targeted procedures, or broader pain support.
Patients should seek evaluation for persistent tendon attachment pain, heel pain, Achilles pain, plantar fascia pain, elbow pain, knee pain, hip pain, or joint-adjacent pain that does not improve with routine care. Evaluation is especially important if symptoms occur with swelling, prolonged morning stiffness, psoriasis, inflammatory back pain, multiple painful sites, numbness, weakness, gout history, fever, or rapidly worsening pain.
MPM approaches enthesitis through a diagnosis-first, coordinated model. The evaluation considers the enthesis, tendon, ligament, bursa, joint, nerve, spine, biomechanics, autoimmune clues, and chronic pain contributors. Care may involve diagnostic ultrasound, medication management, rehabilitation planning, ultrasound-guided injections when appropriate, and coordination with rheumatology when systemic inflammatory disease is suspected.
For patients looking for enthesitis treatment in Manhattan, MPM offers a careful, patient-centered approach to tendon attachment pain, heel pain, inflammatory symptoms, and overlapping musculoskeletal conditions. The goal is to clarify the source of pain and build a treatment plan that reflects the patient’s diagnosis, function, risks, and long-term goals.
