Last updated: 2026-08-07
What Does Shockwave Therapy Do to a Painful Area?
Extracorporeal shockwave therapy (ESWT) delivers physical energy to tissue that has stiffened or been under prolonged stress. This stimulus influences the sensitivity of pain signals and the process by which tissue reorganizes itself. Response to treatment is not judged solely by how much a pain score drops after a single session — it also takes into account how many steps you need to take before morning heel pain eases, how high you can lift your arm without discomfort, and whether you can walk farther without stopping.
A pressure wave generated by the device is transmitted to the affected tendon or fascia (the connective tissue layer that surrounds muscles), causing the tissue to compress and release momentarily. At Dawells, this treatment is offered as a primary therapy, typically once or twice a week, with the goals of breaking up calcium deposits and promoting the growth of new blood vessels. Nerve endings exposed to the mechanical stimulus may show changes in how sensitively they respond to pain signals, and preclinical research has proposed new blood vessel formation and altered collagen metabolism as possible mechanisms. This explains the time lag between the immediate sensations felt right after a session and the changes in movement that may appear weeks later.
Calcific tendinitis (a condition in which hard calcium deposits accumulate in shoulder tendons) is addressed because the pressure wave mechanically stimulates both the deposit and the surrounding tendon tissue. Because deposits vary in size, density, and location, the rate at which they break down differs from patient to patient even with the same number of sessions — so clinicians also assess whether the surrounding tendon is swollen or weakened alongside the calcium itself.
Before treatment begins, X-ray imaging is used to assess bone structure and calcium morphology, while musculoskeletal ultrasound confirms tendon thickness, any areas of tearing, and the extent of fluid accumulation from inflammation. When spinal pain is also involved, the Sigma spinal segmental stiffness test measures resistance values to identify which vertebral levels are restricted and by how much. The depth and breadth of the lesion — whether it is deep and narrow or shallow and spread across a wider surface — determines where the shockwave is directed and how large a treatment area is used, and these findings also guide intensity adjustments for subsequent sessions.
During a session, a thin layer of gel is applied over the lesion site, the device head is pressed firmly against the skin, and pressure waves are delivered for a set number of pulses — typically several thousand per site. When pain is severe, the intensity starts low and increases with each session.
Focused vs. Radial Shockwave: Which Is Better?
Focused ESWT concentrates energy at a single point at a specified depth. It is used when targeting a narrow area such as a deep tendon attachment or a calcium deposit, and both focal depth and energy level can be adjusted to match the lesion. Structures that are hard to locate precisely by palpation alone — such as deep shoulder tendons or tendons around the hip — are identified with imaging guidance before treatment.
Radial ESWT generates pressure waves that spread outward from the skin surface across a broader area. It suits conditions where a larger surface needs to be covered, such as the tissue around the Achilles tendon where it meets the calf muscle, widely stiffened fascia, or the superficial tendons on the outer elbow. Even within the same diagnosis, the choice between the two depends on whether the painful area is deep and localized or shallow and diffuse.
Determining which type produces a better outcome based on device names alone is not straightforward. A systematic review of lateral epicondylitis (tennis elbow) examined results across different shockwave types but noted that differences in energy level, number of pulses, and treatment location between studies made simple comparisons difficult. (Yoon et al., 2020) The type of pressure wave used matters, but so does where it is applied, at what intensity, and to which anatomical target.
Studies reviewing conditions such as plantar fasciitis and Achilles tendinopathy (chronic degeneration of the Achilles tendon) also found that outcomes varied with treatment parameters. (Charles et al., 2023) A patient whose pain is concentrated at a single point on the heel bone requires a different approach from one whose pain pulls forward along the entire length of the plantar fascia. Ultrasound is used to identify the thickened area, and the delivery characteristics are chosen to match the depth and extent of the lesion.
Which Painful Conditions Are Treated with Shockwave Therapy?
People who have experienced stabbing heel pain with their first steps in the morning for more than six weeks, those told they have calcium deposits in the shoulder, and those with recurring outer elbow pain are among those who may consider this treatment. When the first step out of bed has caused sharp heel pain for an extended period, the plantar fascia may have thickened or the attachment point at the heel bone may have been repeatedly irritated. A similar picture applies when outer elbow pain makes it difficult to lift a glass of water or wring out a towel after washing your face. Chronic tendon and fascial conditions tend to produce a fairly well-defined area of tenderness on palpation, which supports consideration of ESWT.
When calcium is visible on imaging or pain catches at a specific angle during shoulder elevation, clinicians distinguish calcific shoulder tendinitis from rotator cuff tendinopathy (a condition in which the shoulder tendons weaken and sustain damage). If adhesive capsulitis (frozen shoulder — a condition in which the entire joint capsule stiffens) is also present, treating the tendon alone may not restore adequate arm movement. The treatment area is determined after reviewing both the imaging findings of calcium deposits and tendon damage and the specific movements that restrict joint motion and muscle strength.
A study following patients with chronic calcific shoulder tendinitis evaluated changes in pain and function at medium-term follow-up after ESWT. (Lee et al., 2011) A 2024 meta-analysis of rotator cuff tendinopathy similarly analyzed pain and shoulder function outcomes, finding that the range of responses varied according to the patient population and energy settings used. (Xue et al., 2024) This is why outcomes cannot be predicted by the number of sessions alone without accounting for the presence and size of calcium deposits and the degree of tendon damage.
Knowing the current limits of the evidence before starting treatment is also worthwhile. A Cochrane systematic review rated the evidence for ESWT in rotator cuff disease — with or without calcification — as still limited. (Surace et al., 2020) Treatment decisions are not made on the basis of shoulder pain alone; imaging findings, range of motion, and the movements that provoke night pain are all reviewed first.
Comparative studies and systematic reviews of plantar fasciitis analyzed post-treatment pain and plantar fascia thickness, but treatment schedules and energy conditions differed across studies. (Charles et al., 2023) Because morning heel pain alone is not sufficient to confirm the diagnosis, the pain pattern and the location of point tenderness are compared before proceeding, with ultrasound findings added when needed.
Patellar tendinopathy (pain at the front of the knee where the patellar tendon attaches) and Achilles tendinopathy with persistent, well-localized pain are also candidates for evaluation. Specific movements are measured — for example, whether the front of the knee hurts going down stairs, or whether the Achilles tendon feels stiff at the start of a run — and the same movements are reassessed at the next session. Functional indicators such as walking distance and joint range of motion are tracked alongside pain scores before and after treatment.
How Many Sessions Before Things Change?
ESWT can be performed once or twice a week, but a fixed total number of sessions is not set before treatment begins. Some patients notice brief relief immediately after a session, while others initially experience only a reduction in point tenderness, with easier movement emerging after several sessions have accumulated. Because tissue condition and stimulus intensity differ between individuals, the schedule is adjusted based on functional changes observed at each follow-up.
For plantar fasciitis, the number of steps needed before morning heel pain subsides is recorded consistently using the same method. For shoulder conditions, the angle to which the arm can be raised without pain is measured. For Achilles tendinopathy, walking distance without stopping is assessed under the same conditions before and after each session. Recording these numbers every session prevents results from being distorted by daily fluctuations in how a patient feels or by short-lived pain relief.
If pain scores remain unchanged after one or two sessions but walking distance or range of motion shows a meaningful improvement across repeated measurements, the possibility of functional improvement preceding pain relief is considered. Conversely, if pain decreases but morning stiffness and range of motion remain the same, movement limitations around the lesion are examined more closely. At the next session, the treatment area may be widened or the focal point shifted, and intensity is adjusted to match how well the tissue is responding to the stimulus.
If functional indicators do not change after multiple sessions, musculoskeletal ultrasound is used to re-examine the lesion identified at baseline. The review checks whether the extent of tendon tearing was underestimated, whether the treatment area has been narrower than the actual painful region, and whether joint stiffness is continuing to concentrate load on the same spot.
Treatment combinations may also change based on findings. When the ligaments or tendons themselves are weakened, prolotherapy or ozone injections guided by ultrasound may be added — typically about every five to seven days for a total of four to six sessions. When pain is severe enough to limit movement from the outset, a nerve block performed under C-arm fluoroscopy (real-time X-ray guidance) may be done first. When stiff fascia is restricting motion, Winback or Lymphatec myofascial release may be combined to restore range of motion before other treatments continue.
Stimulating a lesion with shockwave therapy while the ankle or shoulder remains stiff often means the same area will continue to bear excessive load during daily activities. For this reason, the Dawells pain program is structured in four stages — precise diagnosis with quantified findings, individualized planning, intensive treatment, and relapse prevention. Once discomfort improves, treatment intervals are adjusted while myofascial release and rehabilitative exercise are used to confirm that walking and arm use remain stable over time.
What to Check Before Starting, and When to Seek Evaluation First
ESWT is not covered by national health insurance. Costs depend on the number of lesions, their depth, the treatment area, and the planned number of sessions, and are discussed during the consultation. Even patients with the same diagnosis will have different plans depending on whether only a single point requires treatment or a broad area of tendon and fascia needs to be addressed.
Bruising or redness may appear at the treatment site, and pain may temporarily increase on the day of or the day after a session. When this occurs because the treated tissue has become sensitized to the stimulus, it is generally a transient reaction that resolves with observation.
If swelling and warmth continue to increase, or if pain intensifies rapidly even at rest, reassessment is needed — ultrasound is used to determine whether the reaction falls within the expected range or whether an additional injury has occurred alongside it.
Anyone taking anticoagulants (blood-thinning medications) should inform their clinician of the medication name and dose and must not stop the medication on their own. The timing of treatment is decided after discussing bleeding risk and the underlying condition with the prescribing physician.
Active skin infection or acute inflammation at the intended treatment site are contraindications, as is a clearly swollen and warm area immediately after an acute injury. X-ray is used to rule out fracture and musculoskeletal ultrasound is used to confirm the extent of tendon tearing and inflammation before any necessary treatment is initiated.
Sudden loss of strength in an arm or leg, suspected complete tendon rupture, or pain of unknown cause that worsens rapidly over a short period all require diagnosis before treatment proceeds. Even when pain appears consistent with shoulder calcification, an underlying fracture or significant tendon tear changes both the target site and the treatment approach for shockwave therapy. Imaging findings and strength testing are used to determine first whether the condition is appropriate for monitored conservative treatment.
This content is provided for general medical information purposes only. Individual circumstances vary. Please consult a specialist for accurate diagnosis and treatment.
References
- Yoon, Kim, Shin (2020). Does the Type of Extracorporeal Shock Therapy Influence Treatment Effectiveness in Lateral Epicondylitis? A Systematic Review. Clinical Orthopaedics and Related Research. PMID: 32332245
- Charles, Fang, Zhu (2023). The effectiveness of shockwave therapy on patellar tendinopathy, Achilles tendinopathy, and plantar fasciitis: a systematic review. Frontiers in Immunology. PMID: 37662911
- Lee, Cheng, Grimmer-Somers (2011). The midterm effectiveness of extracorporeal shockwave therapy in the management of chronic calcific shoulder tendinitis. Journal of Shoulder and Elbow Surgery. PMID: 21232988
- Xue, Song, Yang (2024). Effect of extracorporeal shockwave therapy for rotator cuff tendinopathy: a systematic review and meta-analysis. BMC Musculoskeletal Disorders. PMID: 38704572
- Surace, Deitch, Johnston (2020). Shock wave therapy for rotator cuff disease with or without calcification. Cochrane Database of Systematic Reviews. PMID: 32128761
- Cortes-Perez, Moreno-Montilla, Ibanez-Vera (2024). Efficacy of extracorporeal shockwave therapy, compared to corticosteroid injections, on pain and plantar fascia thickness. Clinical Rehabilitation. PMID: 38738305
Frequently Asked Questions
Q. Can pain temporarily get worse after extracorporeal shockwave therapy?
Yes — stimulation of the treatment site can cause pain and tenderness to increase temporarily on the day of or the day after the session. If swelling or warmth continues to increase, or if pain intensifies rapidly even while resting, additional injury should be ruled out.
Q. Should sessions be scheduled once a week or twice a week?
The interval is determined by how quickly discomfort resolves after each session and by what changes in movement are observed at the next visit. When post-treatment discomfort persists longer than usual or the tissue remains particularly sensitive, the schedule may be adjusted to allow more recovery time between sessions.
Q. How is the choice between focused and radial shockwave made based on lesion depth and size?
Deep, narrowly defined lesions are generally better suited to a focused approach that targets a specific location, while shallow, more diffuse lesions may be better addressed with a method that covers the surrounding tissue. The actual decision reflects the location confirmed by physical examination and ultrasound, the area of point tenderness, and the movements that are restricted.
Q. When can I return to exercise and normal daily activities after shockwave therapy?
Light daily activities are generally fine, but on the day of treatment it is advisable to avoid activities that place strong impact or repetitive load on the treated area. The timing for returning to exercise is adjusted based on whether point tenderness, swelling, and joint range of motion have returned to pre-treatment levels.
Q. If there is little change after several sessions, what tests might be repeated?
When pain location and functional changes remain unclear, ultrasound or X-ray may be repeated to reassess tendon damage, calcium deposits, and the condition of nearby joints. Depending on the symptom pattern, if nerve involvement or damage to deeper structures is suspected, additional imaging such as MRI may be considered.