How does IMS work?

Asked by: Marquis Terry DVM  |  Last update: June 1, 2026
Score: 4.1/5 (1 votes)

Intramuscular Stimulation (IMS) is a specialized, minimally invasive, dry-needling technique used by physical therapists to treat chronic pain caused by muscle tightness and neuropathy. It works by inserting thin needles into trigger points to create a "twitch response," which releases knots, stimulates nerve repair, and restores muscle function.

How does an IMS work?

IMS directly treats the cause of the pain by relaxing the shortened muscle and allowing it to return to its normal state. The goal of treatment is to release muscle shortening which presses on and irritates the nerve.

What are the side effects of IMS needling?

Other areas (such as along the spine) are safe to needle as long as the technique used by the practitioner is sound. The most common side effect of IMS is some minor bruising and aching. On rare occasions, some people feel tired after a IMS session and this usually resolves in a few hours.

Does IMS work right away?

However, because the intent is to stimulate the muscle into relaxation, there is often discomfort before the rush of pain relief—some people experience this right away in the session, while others experience the relief a few days later, in addition to increased movement and function of the muscle.

What are the cons of IMS?

Risks and Considerations. While IMS is generally considered safe, there are some potential risks and side effects to be aware of: Temporary Discomfort: Patients may experience mild discomfort or soreness at needle insertion sites. Bruising: Minor bruising can occur at the needling sites.

Body Works Sports Physiotherapy - What is IMS?

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Who should not use muscle stimulators?

Who should NOT use electrical stimulation?

  • Active implants - Cardiac pacemaker/defibrillator or cardiac arrhythmia.
  • Pregnant or planning a pregnancy (speak to your health professional)
  • Seizure/epilepsy and dementia conditions.
  • Local malignancy – do not use in that area.
  • Over an epiphysis.
  • Actively bleeding tissue.

What injuries does IMS work best for?

IMS needling can be very effective at helping new or old injuries heal.

  • 8 types of Injuries treated with IMS. ...
  • Joint problems (osteoarthritis) ...
  • Nerve pain (sciatica) ...
  • Jaw problems (temporomandibular dysfunction) ...
  • Muscle strains and ligament sprains. ...
  • Post-operative procedures (ACL reconstruction) ...
  • Post fracture. ...
  • Whiplash.

What does it feel like when fascia is released?

Fascia release feels like a deep, sustained pressure that gradually melts into tightness, often described as a "good pain," stretching, or softening, with sensations like warmth, tingling, or even "peeling," and can cause temporary muscle twitches as tension releases, leading to greater flexibility and less pain afterward. It's a slow, gentle process where therapists apply steady pressure, and you'll feel tissue unwinding, sometimes with referred sensations or minor soreness as blood flow returns.

What is the 80 20 rule in physiotherapy?

The 80/20 rule in physiotherapy, based on the Pareto Principle, means that 80% of your recovery and results come from just 20% of the effort, focusing on key high-impact exercises, consistent habits, and targeted actions rather than endless, low-value tasks. It's about working smarter by identifying the crucial few movements, education, and daily routines (the "20%") that drive the majority of improvement, leading to faster, more efficient healing and sustainable function. 

How long does IMS last?

IMS sessions typically last between 30 and 60 minutes, depending on the complexity of your condition and the treatment plan outlined by your physiotherapist.

What are the red flags after dry needling?

If you experience any concerning symptoms after dry needling, such as persistent pain, bleeding, or signs of infection, seek medical attention immediately. Proper training can mitigate the risks associated with dry needling.

How often should you do IMS?

How Often Should I Have IMS Treatment? Gunn IMS treatments are usually once a week to allow time between treatments for the muscles to recover and allow the natural healing process to occur. The number of treatments depends on several factors, including: The duration and extent of your condition.

What are the disadvantages of IMS?

Disadvantages of integrated management systems

Some standards do not combine with each other very well. Furthermore, you might have to wait longer for an audit appointment with a certification body, as the audit team has to be competent on both standards and on integrated management systems.

What is the difference between Dry Needling and IMS?

Comparing Dry Needling and IMS

Dry Needling is primarily focused on relieving pain and tension in muscles, while IMS aims to address the underlying nerve dysfunction causing the issue. In some cases, a patient may benefit from a combination of both treatments to address muscle pain and nerve dysfunction.

Can you lose belly fat with EMS?

EMS (Electrical Muscle Stimulation) doesn't directly "burn" belly fat on its own, but it can help tone abdominal muscles, potentially reduce waist circumference, and support fat loss when combined with diet and exercise, acting as a tool to enhance muscle engagement rather than a magic bullet for fat loss. While some studies show slight reductions in belly fat and improved toning, significant fat loss requires lifestyle changes like a calorie-controlled diet and regular strength training, as EMS alone isn't a shortcut.
 

How long does it take to see results from a muscle stimulator?

With consistent use, you can begin to notice improvements in muscle tone, endurance, and strength within 4-6 weeks. Visible muscle growth will depend on the intensity and duration of your EMS sessions, as well as how they complement your exercise routine.

What muscles should not be massaged?

You should avoid deep massage on areas with major nerves, blood vessels, or delicate organs, including the front of the neck, armpits (axilla), groin (femoral triangle), back of the knee (popliteal fossa), abdomen (especially near the belly button), and directly over the spine/bony prominences, along with any areas with injuries, infections, skin issues, varicose veins, or unknown lumps. Always get medical clearance for conditions like DVT or cancer, and use extreme caution or skip areas with recent strains or inflammation.

How to tell if you have tight fascia?

Fascia-related issues can often be overlooked because the symptoms mimic other conditions. But when fascia tightens or forms adhesions, it can restrict movement, create tension, and feel like deep muscle discomfort.

Why does IMS hurt so much?

Regarding IMS treatments being painful or “hurting,” it's important to clarify that the discomfort the client feels is not from the needles themselves, but from the muscle's response to the needles. The discomfort is from the muscle tension caused by the presence of the needle in the muscle.

Which muscles do not regenerate?

Similar to skeletal muscle tissue, cardiac muscle does not regenerate to a great extent. Dead cardiac muscle tissue is replaced by scar tissue, which cannot contract.

Is IMS good for sciatica?

If you experience sharp, burning pain linked with nerve problems, IMS might offer relief. It works by targeting nerves and muscles to lessen pain. People dealing with diabetic neuropathy or sciatica may find it particularly helpful. It helps manage symptoms that can be hard to treat otherwise.