Dry needling involves inserting a thin, solid needle into tight bands of muscle tissue called trigger points to release tension and reduce pain. Unlike injections, the needle contains no medication. The technique relies on the needle itself to produce a mechanical effect in the muscle, which is why it’s called “dry.” It’s performed by trained physical therapists, chiropractors, and other licensed practitioners, and the specifics of how it’s done vary based on the muscle being treated and the depth of the tissue involved.
What Happens During the Procedure
The practitioner first identifies the trigger point by feeling for a taut band or knot in the muscle. Once located, a sterile filiform needle (a thin, flexible, solid needle) is inserted through the skin directly into that spot. For some muscles, the practitioner grasps the tissue between two fingers using a pincer grip and directs the needle toward their fingers underneath. For flatter, more accessible muscles, they may press the tissue flat against the underlying bone and insert the needle directly downward.
Once the needle is in the trigger point, the practitioner manipulates it using one of several techniques. “Pistoning” or “sparrow pecking” involves repeatedly inserting and partially withdrawing the needle in quick, rhythmic motions. Twisting rotates the needle in place, which causes collagen fibers in the surrounding tissue to wind around the needle shaft. This creates a direct mechanical pull on the tissue and activates pain-sensing and stretch-sensing nerve fibers more effectively than other manipulation methods. Some practitioners combine pistoning and twisting in a technique sometimes called “twistoning.” In other cases, the needle is simply left in place for 5 to 30 minutes without active manipulation.
The goal of all these techniques is to produce a local twitch response: an involuntary, brief contraction of the muscle fibers around the needle. This twitch is a spinal reflex, not something the practitioner or patient consciously controls. It changes the length and tension of the muscle fibers and activates sensory receptors that can interrupt the pain cycle. Getting a twitch response is generally considered a sign that the needle has hit the right spot.
Needles Used for Different Body Areas
Dry needling uses solid filiform needles that are much thinner than the hollow needles used for injections or blood draws. A standard needle for most muscles is 0.30 mm in diameter and 50 mm long. For deeper muscles like the quadratus lumborum (a deep lower back muscle), practitioners typically use a 0.30 × 60 mm needle. The psoas, which sits deep in the front of the hip, often requires a 0.30 × 75 mm needle to reach the target tissue. Smaller, more superficial muscles might call for a needle as short as 30 mm.
Thinner needles (0.25 mm) cause less tissue damage and tend to be more comfortable, but they bend more easily and can be harder to direct precisely. Thicker needles are stiffer and easier to guide to a specific point, which matters when targeting deep tissue. The choice often comes down to the practitioner’s skill and the location being treated.
Conditions It Treats
Dry needling targets myofascial trigger point pain, which refers to pain originating from hypersensitive knots in skeletal muscle. These trigger points form in taut bands of muscle fiber and can cause localized pain, referred pain in other areas, and restricted range of motion.
Common treatment sites include the upper trapezius (the muscle running from the neck to the shoulder), the rotator cuff muscles, the gluteus maximus and medius in the hip, the multifidus muscles along the spine, the calf muscles, and the muscles of the jaw. Practitioners use it for conditions like chronic low back pain, neck pain, tennis elbow, heel pain, knee pain, and jaw dysfunction. In one clinical case, dry needling of the jaw’s masseter muscle significantly increased both pain tolerance and how wide patients could open their mouths after just one session.
What It Feels Like and Recovery
The needle insertion itself feels different from a standard injection. Because the needle is solid and very thin, the initial skin puncture is often barely noticeable. When the needle hits a trigger point and produces a twitch response, you’ll feel a brief, deep cramping or aching sensation in the muscle. Some people describe it as a strong muscle spasm that lasts a fraction of a second. The rotator cuff and upper trapezius tend to produce less post-treatment soreness, so practitioners can often treat more of those areas in a single session. Muscles like the calf can be more reactive.
Soreness after treatment is normal and feels similar to the ache you’d have after an intense workout. It can start immediately, a few hours later, or the next morning, and it typically resolves within 24 to 48 hours. Increasing your water intake for the rest of the day helps. Soaking in a warm bath with Epsom salt or applying magnesium oil to the area can also reduce post-treatment stiffness. Light stretching and gentle movement improve circulation and are generally more helpful than complete rest, though vigorous exercise isn’t recommended on the day of treatment. Ice or heat can be applied based on what feels better, with the caveat that heat shouldn’t go on bruised or visibly inflamed areas.
Most people notice improvement within 2 to 4 sessions, though this varies with the severity and duration of symptoms.
Risks and Contraindications
The most common side effects are soreness, minor bruising, and small amounts of bleeding at the needle site. These are expected and resolve on their own. Serious complications are rare. The most significant risk is pneumothorax (a collapsed lung), which can occur when needling muscles over the rib cage if the needle is inserted too deeply. A systematic review puts that incidence rate at less than 0.01%. In a combined dataset of over 3 million acupuncture and dry needling treatments, only 4 cases of pneumothorax were recorded.
Dry needling is not recommended for children under 12, people with needle phobia or an unwillingness to try the technique, those with significant cognitive impairments that would prevent them from communicating during treatment, anyone with a local or systemic infection, people with vascular disease such as varicose veins at the treatment site, those with compromised immune systems, and individuals in the first trimester of pregnancy. Localized swelling at the intended treatment area is also a reason to avoid needling that spot.
How It Differs From Acupuncture
Dry needling and acupuncture both use the same type of solid filiform needle, and some of the needling techniques overlap. The key difference is the framework behind them. Acupuncture is rooted in traditional Chinese medicine and works along energy pathways called meridians. Dry needling is based entirely on modern anatomical and neurological understanding, targeting specific muscular trigger points identified through physical examination. A dry needling practitioner selects needle placement based on which muscle is dysfunctional and where the trigger point sits within it, not based on meridian maps.
Who Can Perform It
In the United States, regulations around dry needling vary significantly by state. Physical therapists are the most common providers, but whether they’re allowed to perform the technique depends on state law. Some states explicitly permit it, others prohibit it, and some have no specific provisions either way. Chiropractors and physicians may also perform dry needling depending on their state’s scope of practice rules. Regardless of the state, practitioners typically complete specialized post-graduate training in the technique beyond their standard clinical education.