Spasticity is treated through a combination of approaches that range from daily stretching and oral medications to targeted injections and, in severe cases, surgically implanted pumps. The right treatment depends on whether the stiffness is widespread or limited to specific muscles, how severe it is, and what’s causing it. Most people use several strategies together, and the first step is often the simplest: identifying and removing whatever is making the spasticity worse.
What Spasticity Actually Is
Spasticity is a velocity-dependent increase in muscle tone, meaning your muscles resist movement more when someone tries to move them quickly. It happens because of damage to the nerve pathways that run from the brain down through the spinal cord. These upper motor neurons normally send a mix of signals that keep your stretch reflexes in check. When they’re damaged, the brakes come off, and your muscles overreact to being stretched.
The most common causes are stroke, spinal cord injury, multiple sclerosis, traumatic brain injury, and cerebral palsy. After the initial injury, weakness and loss of coordination appear immediately. Spasticity typically develops over weeks to months as the spinal cord adjusts to functioning without its usual regulation from the brain. The result can range from mild stiffness that makes movement awkward to severe tightness that locks joints in painful positions.
Remove Triggers First
Before adding any medication or therapy, treating spasticity starts with finding what’s making it worse. The nervous system ramps up spasticity in response to irritating stimuli, and removing those triggers can produce a noticeable improvement on its own. Common culprits include urinary tract infections, constipation, kidney stones, skin ulcers, ingrown toenails, boils, deep vein thrombosis, poorly fitting braces or wheelchairs, and even emotional stress. Rapidly stopping an antispasticity medication can also cause a rebound spike.
If spasticity suddenly worsens, the cause is often one of these hidden irritants rather than a change in the underlying neurological condition. A systematic check for infections, skin breakdown, bladder issues, and equipment fit should come before any adjustment to medications.
Stretching and Physical Therapy
Regular stretching is the backbone of spasticity management. It helps maintain range of motion in affected joints and can reduce the resting tone of stiff muscles. Static stretches held for 60 to 120 seconds primarily affect muscle tissue, while continuous stretching held for longer than 10 minutes also begins to lengthen tendons. The key is consistency: evidence suggests that stretching programs lasting less than seven months generally don’t produce clinically meaningful improvements in joint mobility, so this is a long-term commitment rather than a quick fix.
Physical and occupational therapists also use techniques like weight-bearing exercises, functional electrical stimulation, and task-specific training to work around spasticity and build usable strength. The goal isn’t just to loosen muscles but to translate that looseness into better function, whether that means walking more smoothly, reaching for objects, or dressing independently.
Braces and Orthotics
Ankle foot orthoses (AFOs) are among the most commonly prescribed devices for lower-limb spasticity, especially after stroke. They stabilize the ankle, prevent the foot from dropping or turning inward during walking, and provide a prolonged, gentle stretch that helps manage tone throughout the day. For people with mild to moderate spasticity, AFOs offer real benefits with fewer side effects than medications.
Two main designs exist. Posterior AFOs use a leaf-spring design behind the leg and are the traditional choice. Anterior AFOs wrap around the front of the shin and may be more effective at reducing spasticity in the calf muscles, since less contact with the back of the leg means less stimulation of already-tight muscles. Anterior designs are also comfortable to wear barefoot at home, making them practical for extended daily use. For significant spastic inversion (the foot turning inward), metal-framed AFOs provide stronger correction, though most people prefer lighter thermoplastic versions for everyday wear. Resting hand splints and elbow extension splints serve similar purposes for the upper limb, holding joints in a stretched position to prevent permanent shortening.
Oral Medications for Widespread Stiffness
When spasticity affects large areas of the body, oral medications can turn down the overall level of muscle tightness. The two most commonly prescribed options work in different ways.
Baclofen acts on receptors in the spinal cord that normally inhibit muscle activity, essentially replacing some of the inhibition lost when upper motor neurons are damaged. It’s effective for spasticity from spinal cord injury and multiple sclerosis and is typically started at a low dose and increased gradually. Drowsiness is the most common side effect, and stopping it abruptly can trigger dangerous withdrawal symptoms including seizures, so doses are always tapered.
Tizanidine works in the central nervous system to reduce muscle spasms, cramping, and tightness. It’s typically started at 2 milligrams every six to eight hours and adjusted from there. It tends to cause less weakness than baclofen, which can be an advantage for people who need to stay as strong as possible for walking or transfers. Drowsiness, dry mouth, and dizziness are common.
Other oral options include dantrolene, which works directly on muscle fibers rather than the nervous system, and benzodiazepines, which have broader sedating effects. All oral medications come with a trade-off: the dose needed to meaningfully reduce spasticity often causes sedation or weakness that limits daily function. This is why localized treatments are preferred when the problem is concentrated in specific muscles.
Botulinum Toxin Injections for Focal Spasticity
When spasticity is most problematic in a few specific muscle groups (a clenched fist, a curled toe, a stiff elbow), botulinum toxin injections are considered a first-line treatment. The toxin blocks the nerve signal that tells the muscle to contract, weakening it enough to reduce the spasticity without affecting the rest of the body.
Injections are placed directly into the target muscles, with doses scaled to muscle size. Small muscles might receive less than one unit, while large leg muscles can require 200 to 300 units. The effect typically begins within a few days, peaks at around two to six weeks, and gradually wears off. Follow-up visits are usually scheduled three to six months after each treatment to reassess and re-inject if needed.
The real value of botulinum toxin often shows up in combination with therapy. The temporary window of reduced tone gives therapists a chance to stretch, strengthen, and retrain movement patterns that spasticity had been blocking. Treatment goals should be clearly defined before each injection cycle, whether that’s improving the ability to grip an object, making it easier for a caregiver to dress the affected limb, or reducing pain.
Intrathecal Baclofen Pumps
For people with severe spasticity, particularly in the legs, that hasn’t responded adequately to oral medications or injections, a surgically implanted baclofen pump is an option. The pump is a small device placed under the skin of the abdomen, connected to a thin catheter that delivers baclofen directly into the fluid surrounding the spinal cord. Because the medication goes straight to where it’s needed, it can be effective at a fraction of the oral dose, dramatically reducing sedation and other systemic side effects.
Before committing to surgery, a screening test is performed. A small test dose of baclofen is injected through a spinal tap to see whether it produces meaningful relief. If it does, the pump is implanted. Programmable electronic pumps allow doctors to fine-tune the dose over time, adjusting for changes in spasticity throughout the day or as the condition evolves.
The pumps require ongoing maintenance. The reservoir needs to be refilled every few months through a needle inserted into a port on the device, and battery-powered pumps eventually need surgical replacement (typically every five to seven years). Catheter-related complications, such as kinking, disconnection, or migration, are the most frequent issue. If the catheter fails and baclofen delivery suddenly stops, withdrawal symptoms can be serious, including high fever, altered mental status, and rebound spasticity. Anyone with a pump needs reliable access to a medical team familiar with the device.
Selective Dorsal Rhizotomy
This surgical procedure permanently reduces spasticity by cutting selected sensory nerve fibers at the spinal cord level that are driving the overactive stretch reflex. It’s primarily used in children with cerebral palsy, specifically those with spastic diplegia (stiffness mainly in the legs) who are between roughly 5 and 10 years old.
Candidacy criteria are strict. Children need to have moderate to severe spasticity but adequate underlying leg strength (at least a moderate ability to move against gravity), reasonable balance, an IQ of 70 or above, and strong motivation along with solid family support for what is an intensive rehabilitation process afterward. Children with significant hip problems, scoliosis, dystonia (involuntary twisting movements), or severe fixed joint deformities are typically excluded. When the right candidates are selected, the results can be lasting, reducing spasticity permanently and improving walking ability over the long term.
Cannabinoid-Based Treatments
For people with multiple sclerosis, pharmaceutical cannabinoids represent one of the few complementary approaches with strong clinical evidence for spasticity. Nabiximols, an oral spray containing both THC and CBD, is approved in several countries as an add-on treatment for adults with moderate to severe MS-related spasticity that hasn’t responded well enough to other medications. It’s used alongside existing treatments, not as a replacement.
The evidence for cannabinoids in spasticity from other causes (stroke, spinal cord injury) is much thinner. While individual patients report benefits, the rigorous clinical trial data supporting pharmaceutical cannabinoids is largely specific to MS. This distinction matters when weighing the potential side effects, which include dizziness, fatigue, and cognitive changes.
Putting a Treatment Plan Together
Spasticity management almost always involves layering multiple approaches. A typical plan might combine daily stretching and an orthotic to maintain joint position, an oral medication to take the edge off overall stiffness, and botulinum toxin injections in the one or two muscle groups causing the most functional trouble. The specific combination shifts over time as spasticity changes, as function improves or declines, and as treatment goals evolve.
Not all spasticity needs aggressive treatment. Some degree of increased tone in the legs actually helps people stand and transfer. The goal is never to eliminate spasticity entirely but to reduce it to the point where it stops interfering with function, comfort, and care. That target is different for every person, and it shapes which treatments are worth pursuing and how aggressively to dose them.