Spasticity Management: What You Should Know

Spasticity is stiff or tight muscles, sudden spasms, jumpy reflexes, or a limb that beats rhythmically (called clonus). It is very common after spinal cord injury. About 65% to 93% of people with SCI have it (per MSKTC). It is more common with neck (cervical) injuries and with incomplete injuries.

For some people it is mild. For others, strong spasms get in the way of transfers, dressing, sleep, hygiene, or breathing. Tone is not always bad — many people use it to their advantage. But when it causes pain, skin damage, stiff joints, or safety risks, it is worth treating.

The good news: a step-by-step plan of positioning, stretching, activity, and — when needed — medicine keeps spasticity manageable for most people. The goal is rarely zero tone. It is to keep tone from getting in the way of your life and your health.

🚨 Red Flags — When to Seek Emergency Care

Call your rehab team the same day, or go to the ER, if:

• Your spasms suddenly get much stronger or more frequent with no clear reason. A new fracture, infection, or skin breakdown below your injury can spike your tone (per MSKTC). Treat new or worsening spasticity as a warning that something below your level needs attention.
• You have trouble breathing or swallowing from trunk, chest, or neck spasms.
• A joint that used to move becomes stuck and painful — this can be a new contracture (a permanently tight joint) or abnormal bone forming in soft tissue.
• You get new skin breakdown where tone keeps a limb rubbing or pressing.
• You have fever, chills, or other signs of infection along with a spasticity spike — a UTI, pressure injury, or belly problem is a common hidden cause.
• Your baclofen pump may have failed. In someone with a pump, a sudden return of severe spasticity, itching, or high temperature can mean withdrawal. This is a medical emergency. Go to the ER and say you have a baclofen pump.

New spasticity that starts for the first time more than a year after your injury, with no clear cause, also needs a prompt check. It can sometimes signal a syrinx — a fluid-filled cavity forming in the cord (per MSKTC).

Tell any new medical team: “I have a spinal cord injury. Pain or infection below my level can trigger spasticity.”

Understanding Spasticity

Knowing why it happens makes the whole treatment menu make sense.

Your brain normally keeps reflexes calm. A stretch reflex is the automatic tightening you feel when a muscle is stretched fast — the same one a doctor tests by tapping below your kneecap. Your brain sends steady “calm down” signals down the cord so these reflexes do not fire at every small movement (per SCIRE).

SCI cuts off that calming signal. When the cord is injured, the brain’s damping signal cannot get through. The reflex circuits inside the cord become over-active and fire on their own. You get higher baseline tone plus spasms and jumpy reflexes (per MSKTC). Over time, muscles and tendons can also shorten and stiffen, adding to the problem.

It usually starts after spinal shock fades. In the first few weeks, reflexes below your level are often quiet. As that passes, reflexes come back — but over-active rather than normal (per Reeve).

Spasticity is speed-sensitive. The faster a muscle is stretched, the more it resists. That is why quick movements, fast transfers, and clonus are common triggers (per SCIRE).

The same tone can help one person and harm another:

• Tone can help. Many people use it to support their weight during transfers or standing, to keep muscle bulk and circulation, or to help empty the bladder or bowel. A spasm spike is often the first hint of a UTI or pressure injury (per SCIRE).
• Tone can harm when it causes pain, broken sleep, skin breakdown, contractures, unsafe transfers, hygiene trouble, or accidents.
• The choice is yours and your team’s. Treating tone that is not a problem has costs too — side effects, time, and losing useful tone. Decide together whether your spasticity is helping or getting in the way (per SCIRE).

Find the Trigger First — The Noxious-Stimulus Check

A sudden rise in tone almost always has a cause below your level that you can no longer feel as pain. Before adding or raising treatment, run this list. Removing the trigger is often the fastest way to calm a flare (per MSKTC).

• Bladder — a full bladder, a blocked or kinked catheter, or signs of a UTI.
• Bowel — constipation, impaction, or large hemorrhoids. Stay on your bowel program.
• Skin — check bony points and pressure areas for redness, rubbing, or breakdown.
• Feet and nails — an ingrown toenail, blister, or tight footwear.
• Clothing and gear — loosen tight clothes, wraps, binders, straps, or shoes. Fix poor seating or bed positioning.
• Pain or injury — a fracture, sprain, or recent surgery below your level.
• Autonomic dysreflexia — if you are injured at T6 or above, these same triggers can set off AD. A spike with a pounding headache, sweating, or flushing is an emergency (see the autonomic-dysreflexia guide).
• Other stressors — infection elsewhere, extreme heat or cold, your menstrual cycle or pregnancy, fatigue, or stress.

A spike in spasticity is information. Read it before you medicate it.

The Management Ladder — From Daily Habits to Procedures

Treatment is layered. It starts with the least invasive steps and adds medicine or procedures only if needed. Most people combine a few approaches, and finding the right mix takes trial and error (per SCIRE).

Step 1 — Daily habits and positioning

• Run the trigger check above whenever tone climbs. Manage bladder, bowel, and skin first.
• Change position often in bed. Do pressure reliefs when sitting.
• Use seating and sleep supports that keep hips, knees, and ankles in neutral. Don’t let legs cross or feet point down for long.
• Stretch daily, focusing on your tightest muscles — often hamstrings, hip flexors, calves, wrist and finger flexors, and shoulders.
• Stand, or use a tilt table or standing frame if it is in your program. Weight-bearing gives a long stretch and often lowers tone for a while (per SCIRE).
• Check skin over bony points at least twice a day.

Step 2 — Safe stretching and movement

• Stretch slowly and gently. Never force a joint past mild discomfort.
• Move slowly. Because tone is speed-sensitive, slow movement triggers less resistance than a quick pull.
• Use gravity, your body weight, or a strap rather than someone pulling hard.
• A wedge or pillow between the knees gives the hips a long, gentle stretch (per SCIRE).
• Protect your arms and hands. Strong tone or a hard spasm during a transfer can injure shoulders, elbows, and wrists — see the upper-limb-function guide.

Step 3 — Splints, casting, and braces

• Splints and braces hold a limb in a working position and give a steady, gentle stretch. An ankle-foot orthosis keeps the foot from pointing down and helps prevent calf tightening (per Reeve).
• Serial casting slowly lengthens a muscle that has begun to tighten, over a series of casts.
• Your therapy team fits these. Check skin closely under any splint or cast, since reduced feeling can hide pressure.

Step 4 — Activity and stimulation therapies

• Arm or leg cycling — alone or with functional electrical stimulation (FES) — can lower tone for some people (per MSKTC).
• Electrical stimulation of weak muscles, and focal or whole-body vibration, are options some teams add.
• TENS (mild skin-surface nerve stimulation) and massage are gentle add-ons; effects tend to be short.
• If your injury is incomplete, supported walking or treadmill training may be part of the plan.

Step 5 — Oral medicines (by class)

When physical steps are not enough — especially for widespread tone — your doctor may add a pill. These are named by class only; dosing belongs to your prescriber, and most are started low and raised slowly (per MSKTC).

• Baclofen — the most common oral drug; it calms over-active spinal reflexes through GABA pathways.
• Tizanidine — eases spasms and tightness; can lower blood pressure and, rarely, affect the liver.
• Benzodiazepine muscle relaxants (such as diazepam or clonazepam) — reduce reflexes but are sedating and can affect attention and memory.
• Dantrolene — the one class that works on muscle itself, not the nerves; weakness and occasional liver effects mean bloodwork is often part of the plan.

Two safety points apply to all of them:

• Watch for sedation, weakness, and blood-pressure changes. Tell your team if side effects limit your function.
• Never stop an antispasticity medicine suddenly. Rebound can be severe, so these drugs must be tapered, not stopped cold (per Reeve). They can also lose effect over time, so doses may need adjusting.

Step 6 — Focal injections

When only one muscle or a small group is the problem, your doctor may inject it directly — sparing you whole-body side effects (per MSKTC).

• Botulinum toxin temporarily blocks the nerve-to-muscle signal in the injected muscle. The effect takes a few days to build and lasts around three months, so injections are repeated. A few people build antibodies that reduce its effect over time.
• Phenol or alcohol blocks damage nerve or muscle tissue to limit spasms. The effect lasts longer, but the injection is more painful than botulinum toxin (per Reeve).

Step 7 — Intrathecal baclofen pump

For severe, widespread tone that pills cannot control — or when pill side effects are too much — a pump delivers baclofen straight into the fluid around the cord (per MSKTC).

• Because the drug goes right to the cord, far lower doses are needed and sedation tends to be milder.
• A test dose is given first to confirm you respond before the pump is implanted.
• The dose is adjustable, and the pump can be stopped or removed.
• Trade-offs: it needs surgery (with infection risk), the battery is replaced every few years, you attend regular refill visits, and a fault can cause under- or over-dosing. A pump is usually offered only after other treatments have been tried.

Step 8 — Surgery (last resort)

Surgery is saved for set contractures or tone that nothing else controls, partly because some options cannot be reversed (per MSKTC).

• Orthopedic — releasing or lengthening a tight tendon (the Achilles is most common) and repositioning the joint.
• Neurosurgical — rhizotomy (cutting over-active sensory nerve rootlets) or, rarely, myelotomy (cutting part of the cord).

Your team will only raise these if simpler steps have truly run out, and will walk you through the trade-offs.

Tracking Your Spasticity

• Spasticity is judged mainly by physical exam — moving your joints slowly and fast, testing strength and reflexes, and watching tasks like transferring (per SCIRE).
• Your team may use rating scales to track change and see if a treatment is helping.
• Keep your own simple log: how tone shifts through the day, what sets it off, and what helps. Bring it to visits.
• Expect change over the years. Some people find tone eases with age or better trigger control; for others it worsens. Regular check-ins keep the plan current (per MSKTC).

When to Call Your Doctor (Non-Emergency)

• Your usual stretching or positioning routine suddenly stops working.
• You need higher doses, or side effects limit your function.
• Spasticity disturbs sleep, transfers, hygiene, or skin care on most days.
• You notice new contractures or lost range that keeps getting worse despite daily care.
• You are considering a new treatment (injections, pump, surgery) and want a referral to an SCI center.
• A baclofen pump is due for a refill — never let a refill lapse.

What Many People Find Helpful

Many people find a warm shower or bath before bed quiets nighttime spasms. Others keep a foam roller or therapy ball nearby for quick stretches. Some notice that regular standing or FES cycling lowers their baseline tone over weeks.

A simple “trigger card” in your wallet — your top three triggers and the first two things you do about them — saves time on a bad day and helps a new caregiver act fast. Tell new caregivers your triggers and the two or three things that calm your tone on day one.

The most consistent wins are the boring daily habits: a reliable bladder and bowel program, twice-daily skin checks, and the same stretching routine morning and night.

Evidence & Sources

Synthesized from MSKTC factsheets, SCIRE Community evidence summaries, PVA Consortium consumer guides, and Christopher & Dana Reeve Foundation booklets (retrieved 2026-07-02). See RESEARCH-SOURCES.md for complete provenance and cross-bucket details. Cause and trigger detail draw mainly on the MSKTC “Spasticity and Spinal Cord Injury” factsheet and SCIRE’s spasticity summary; the treatment ladder and self-care framing draw on the Reeve “Managing Spasticity” booklet (Second Edition).

Printable One-Pager Notes

• This guide runs longer than one page. For a one-pager, print the Red Flags block, the Trigger Check, and Steps 1–2 of the ladder.
• Keep the Red Flags block and the Trigger Check in the upper half when printed.
• Favor the bulleted checklists over the prose when space is tight.
• Use 11–12 pt body text with generous line spacing.
• The 🚨 emoji prints on modern printers; if yours drops it, write “RED FLAGS — EMERGENCY” at the top.

You are the expert on your own tone. Most people with SCI find a stable, livable balance once they learn their triggers and build a short, repeatable daily routine. Keep this guide with your other self-care notes and review it whenever your pattern changes.