ESWT Therapy: Types, Conditions, and How Extracorporeal Shockwave Works
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ESWT (extracorporeal shockwave therapy) sends acoustic pressure waves into a painful tendon, fascia or bone to trigger local repair, break up calcium deposits and reduce pain. The FDA approved the first ESWT device for chronic plantar fasciitis in 2000; most other uses, including erectile dysfunction, are off label and usually cash pay.
At a Glance
- ESWT (extracorporeal shockwave therapy) uses acoustic pressure waves to stimulate tissue repair, break down calcifications, and reduce pain.
- Three types: focused (deep tissue, precise targeting), radial (broader coverage, superficial), and low-intensity (for ED and cardiac).
- FDA approved devices exist for chronic plantar fasciitis and tennis elbow. Bone non-unions, tendinopathy, ED and trigger points are off label in the US.
- Typical course: 3 to 5 sessions, one week apart. Improvement usually builds over 4 to 12 weeks after treatment.
- ESWT grew out of lithotripsy, the shockwave technique used to break up kidney stones since the 1980s.
- The FDA approved the first musculoskeletal ESWT device in 2000 for chronic plantar fasciitis.
- Focused ESWT reaches up to 12 cm deep; radial ESWT spreads energy across about 3 to 4 cm.
- Gerdesmeyer and colleagues (JAMA, 2003) found focused ESWT outperformed sham treatment for calcific shoulder tendinitis.
- The American Urological Association (2018) classes shockwave for erectile dysfunction as investigational.
What is ESWT and how does it work?
ESWT, also called shockwave therapy, SWT or acoustic wave therapy, delivers short pressure pulses from an applicator outside the body, with no needle or incision. Researchers believe the mechanical stress increases blood flow, prompts new blood vessel growth and fragments calcium deposits. Orthopedic surgeons, podiatrists, sports medicine physicians, physical therapists, chiropractors and urologists offer it; the shockwave therapy treatment guide covers the wider field.
Understanding the Three Types of ESWT
Not all shockwave devices are the same. The type of shockwave determines how deep it penetrates, how precisely it can be targeted, and which conditions it is used for.
Focused ESWT (fESWT)
Generated by electromagnetic, electrohydraulic, or piezoelectric sources. Produces a single, high-pressure pulse that converges at a specific focal point deep in tissue (up to 12 cm). This is the type used for calcific tendinopathy, bone non-unions, and deep tissue pathology. Often guided by ultrasound imaging for precise targeting. The energy density is high, which is why focused ESWT can be uncomfortable and sometimes requires local anesthesia.
Radial ESWT (rESWT)
Generated pneumatically by firing a projectile inside a handpiece. The pressure wave radiates outward from the point of contact, covering a broader area but with less penetration depth (3 to 4 cm). This is the most commonly used type in physical therapy and chiropractic settings. It is used for plantar fasciitis, superficial tendinopathies (tennis elbow, Achilles), and myofascial trigger points. Generally well-tolerated without anesthesia.
Low-Intensity ESWT (Li-ESWT)
Uses focused waves at lower energy levels. The primary application is erectile dysfunction, where the goal is neovascularization (new blood vessel formation) rather than tissue disruption. Also being studied for cardiac applications (angina). The treatment is painless and typically involves 6 to 12 sessions.
FDA-Approved Indications
- Plantar fasciitis: For chronic plantar fasciitis that has not responded to 6+ months of conservative treatment
- Lateral epicondylitis (tennis elbow): Some devices have specific approval
- Bone non-unions: Fractures that have failed to heal after adequate time; approved in parts of Europe, generally off label in the US
Common Off-Label Applications
- Calcific shoulder tendinopathy (strong evidence for focused ESWT)
- Achilles tendinopathy (insertional and mid-portion)
- Patellar tendinopathy (jumper’s knee)
- Erectile dysfunction (early, mixed evidence for Li-ESWT)
- Myofascial trigger points
- Greater trochanteric pain syndrome
- Wound healing (diabetic ulcers, chronic wounds)
What to Expect
Sessions take 15 to 30 minutes. You will feel rhythmic tapping or pulsing at the treatment site. Focused ESWT at high energy can be uncomfortable; radial ESWT is generally well tolerated.
Afterward, expect mild soreness for 1 to 2 days. Avoid NSAIDs for 48 to 72 hours (inflammation is part of the healing mechanism). Most protocols involve 3 to 5 sessions, one week apart. Maximum benefit appears 8 to 12 weeks after completing treatment. Clinicians usually avoid ESWT in pregnancy and over growth plates, tumors or infection.
Finding an ESWT provider
The directory of shockwave therapy clinics lists providers by state and city. Listing order is not paid ranking, Featured slots are labeled and capped, Verified means credential checks rather than spend, and Regenerated.com is free for patients. Ask each clinic whether its device is focused or radial.
Frequently asked questions
What is ESWT therapy used for?
ESWT is used mainly for chronic tendon and fascia pain that has not improved with rest or physical therapy. FDA approved devices cover chronic plantar fasciitis and tennis elbow. Off label uses include calcific shoulder tendinopathy, Achilles tendinopathy, trigger points and erectile dysfunction, with evidence strongest for the shoulder and heel.
Does shockwave therapy hurt?
Shockwave therapy feels like firm, rapid tapping. Radial ESWT is usually tolerable without numbing, while high energy focused ESWT can be painful enough to need local anesthesia. Low intensity ESWT is usually painless. Mild soreness or redness for a day or two afterward is common.
How many ESWT sessions do you need?
Most musculoskeletal ESWT protocols use 3 to 5 sessions about one week apart, each lasting 15 to 30 minutes. Low intensity protocols for erectile dysfunction typically run 6 to 12 sessions. Benefit builds gradually and peaks 8 to 12 weeks after the final session.
Does insurance cover ESWT?
Many US insurers consider ESWT for musculoskeletal pain investigational, so most patients pay out of pocket. Prices vary by device, condition and region, so ask for the full course cost in writing. Alternatives such as PRP injections are usually cash pay as well.
