
Multiple sclerosis (MS) is an inflammatory condition that interferes with the flow of information in the central nervous system. It can cause a wide range of symptoms, including muscle spasms, stiffness, and spasticity. Spasticity is a common symptom of MS, affecting 40-80% of people with the condition at some point, and occurs when there is an increase in muscle tone, or resistance in the muscle, causing them to feel stiff, heavy, and tight. This resistance can lead to muscles being slow to relax, resulting in stiffness and, in some cases, violent contractions.
| Characteristics | Values |
|---|---|
| What is spasticity | Spasticity happens because of an imbalance in the electrical signals coming from the brain and spinal cord, often when multiple sclerosis has damaged the nerves there. |
| How does it affect muscles | Spasticity makes muscles feel tight, stiff, and heavy. |
| How does it cause spasms | Spasms are sudden exaggerated movements that can make you lose your balance and wake you at night. They happen when multiple muscles contract at the same time causing a sudden jerky movement. |
| Which muscles does it affect | Spasms can affect any muscle, but they are most common in your legs, arms, and back. |
| How does it restrict movement | Spasticity and spasms can restrict how you move, cause uncontrolled movement, and may be painful. |
| How to identify spasticity and spasms | Learning to identify spasticity and spasms is the first step to getting help. This is not always easy with a condition like MS. |
| How to manage spasticity | Doctors can choose from several kinds of medications, physical therapy, and surgery to treat MS-related spasticity. |
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What You'll Learn

MS spasticity and spasms
Spasticity and spasms are common symptoms of multiple sclerosis (MS). Spasticity is caused by an imbalance in the electrical signals between the brain and spinal cord, often when MS has damaged the nerves there. This unevenness causes muscles to contract on their own and become tense. Spasticity can make muscles feel tight, stiff, heavy, and difficult to move and bend. It can also cause muscles to twitch or jerk in an uncontrolled way, which is known as a spasm.
Spasms are sudden involuntary movements that can make the arms or legs move in different ways. They can cause a limb to involuntarily kick out or jerk towards the body. They can also affect the spine, causing it to twist or arch. Spasms can affect any muscle but are most common in the legs, arms, and back. They can be uncomfortable, annoying, and tiring, and for some people, they can be painful.
There are several treatment options available for MS-related spasticity and spasms. These include medications such as skeletal muscle relaxants, botulinum toxin, alpha2-adrenergic agonists, and benzodiazepines. Physical therapy, surgery, and occupational therapy can also help manage these symptoms. Learning to identify triggers and developing a specific management plan with a healthcare professional can also help reduce the effects of spasticity and spasms.
It is important to note that MS spasticity and spasms can vary from person to person, so an individual approach to treatment and management is best. While these symptoms do not always require medical treatment, early recognition and management can help prevent complications and maintain a healthy and active lifestyle.
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MS triggers and treatments
Multiple sclerosis (MS) is an autoimmune disease that damages the protective cover around nerves called myelin in the brain and spinal cord. This disruption to the nervous system results in a range of signs and symptoms, including physical, mental, and sometimes psychiatric problems. While there is currently no cure for MS, treatments can help manage symptoms and slow disease progression.
Triggers
MS symptoms can be triggered or worsened by various factors, including:
- Stress
- Lack of sleep
- Vitamin deficiencies
- Infections, such as the flu or common cold
- Changes in body temperature, either too hot or too cold
- Tight clothing
- Certain medications
Treatments
Treatments for MS aim to minimize inflammation and manage symptoms to prevent further attacks and slow disease progression. Treatment options include:
- Medications: Various medications can be used to treat MS symptoms, including skeletal muscle relaxants, benzodiazapines, alpha2-adrenergic agonists, and antispasmodics. Corticosteroids are also commonly used during symptomatic attacks.
- Physical therapy: Stretching and regular movement can help reduce the risk of complications and improve function.
- Surgery: In some cases, surgery may be an option to treat spasticity. One type of surgery, called a rhizotomy, involves cutting away part of the spinal nerve to relieve pain and ease muscle tension. Another type, a tenotomy, involves cutting severely tight tendons away from the muscles.
- Alternative treatments: Some people pursue alternative treatments, such as cannabis products, despite a lack of supporting evidence.
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MS and nerve damage
Multiple sclerosis (MS) is an immune-mediated, inflammatory condition that interferes with the flow of information in the central nervous system (CNS). It causes nerve damage that can affect muscle movements in different ways, leading to a range of problems.
Spasticity and Spasms:
Spasticity and spasms are common symptoms of MS, affecting 40-80% of people with the condition at some point. Spasticity occurs due to an imbalance in electrical signals from the brain and spinal cord, causing muscles to contract on their own and become tense. This can make the muscles feel stiff, heavy, and tight, restricting movement and causing uncontrolled jerky movements. Spasms are sudden involuntary contractions of one or more muscles, leading to unpredictable movements like kicking out or clamping together. They can be painful and annoying, disrupting daily activities and sleep.
Nerve Damage and Muscle Problems:
MS damages nerves in the brain, spinal cord, and eyes, impairing nerve signaling. This disruption can lead to muscle stiffness, involuntary spasms, and weakness. Muscle weakness can affect any part of the body but is particularly challenging when it impacts mobility in the legs, ankles, and feet. Nerve damage can also cause vision problems, bladder and bowel issues, and balance problems due to damaged pathways in the brain.
Treatments for Spasticity and Spasms:
Managing spasticity and spasms in MS involves tailored healthcare support, regular movement, stretching, and identifying triggers. Physical therapy, medications, and surgery are treatment options. Medications include muscle relaxants, skeletal muscle relaxants, botulinum toxin injections, alpha2-adrenergic agonists, and nervous system depressants. Surgery options include rhizotomy, where part of the spinal nerve is cut away, and tendon release, which involves cutting tight tendons away from the muscles.
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MS symptoms and diagnosis
Multiple sclerosis (MS) is a disease that destroys the fatty tissue surrounding nerves, impairing their ability to conduct electrical impulses to and from the brain. This can cause a range of symptoms, including muscle weakness, impaired coordination, and fatigue.
Symptoms
MS symptoms can vary widely and may flare up or worsen without any notice. They can include:
- Muscle spasms and stiffness: These are very common symptoms of MS, affecting between 40% and 80% of people with the condition at some point. Spasms are sudden, exaggerated movements that can cause a loss of balance and disrupt sleep. They can affect any muscle but are most common in the legs, arms, and back. Spasticity refers to the increased tension or resistance in muscles, which can cause them to feel stiff, heavy, and slow to relax.
- Fatigue: This may be brought on by physical activity but can sometimes be constant and unrelenting.
- Cognitive problems: About half of people with MS experience thinking and cognitive issues linked to the disease.
- Nerve damage: This can accumulate and lead to worsening symptoms and complications such as impaired balance and an increased risk of injury.
Diagnosis
MS can be challenging to diagnose as its symptoms can overlap with several other common conditions. There is no single diagnostic tool, but healthcare providers use a combination of physical and neurological exams, imaging tests (such as MRI scans), lab tests (including blood work and spinal fluid analysis), and medical history to rule out other causes.
During an MRI scan, providers look for evidence of myelin damage, which appears as scars, lesions, or plaques. Myelin is the fatty tissue that surrounds and protects nerve fibers, and its damage impairs nerve cell communication, leading to MS symptoms. Evoked potentials and eye exams may also be used in the diagnostic process.
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MS and muscle weakness
Multiple sclerosis (MS) is an autoimmune condition that affects the brain and spinal cord (central nervous system). It damages the protective cover around nerves called myelin, interrupting the messages sent throughout the body to perform functions like vision, sensation, and movement. This nerve damage can cause muscle weakness, vision changes, numbness, and memory issues.
Muscle weakness in MS is linked to nerve damage and impaired message transmission. It can cause a range of problems with muscle movements, including stumbling or tripping, and other walking problems. Core stability or postural muscles, which are deep muscles in the abdomen, pelvis, and back, can be affected, making it difficult to maintain good posture.
Spasticity and spasms are common symptoms of MS, causing muscles to feel stiff and heavy, or move unpredictably. Spasms are sudden, exaggerated movements that can cause a loss of balance and disturb sleep. They happen when multiple muscles contract simultaneously, causing a jerky movement. For example, legs can shoot upwards, kick out, or clamp together, or the spine can twist or arch. Spasms can affect any muscle but are most common in the legs, arms, and back. They can be uncomfortable, annoying, and tiring, and sometimes painful.
Spasticity occurs due to an imbalance in electrical signals from the brain and spinal cord, often when MS has damaged the nerves. This unevenness causes muscles to contract on their own and become tense. Spasticity can be treated with physical therapy, medications, surgery, or a combination of these approaches. Physical therapy typically involves stretching to lengthen the muscles. Doctors may prescribe skeletal muscle relaxants, such as baclofen, dantrolene, or benzodiazepines, which slow down messages in the nervous system. Botulinum toxin shots can also be used to relax muscles by blocking nerve messages. In some cases, surgery may be an option, such as a rhizotomy or tendon release procedure, to cut away part of the spinal nerve or tight tendons, respectively.
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Frequently asked questions
Muscle spasms are painful contractions and tightening of your muscles. They are common, involuntary and unpredictable. They can affect anyone at any time, in one or multiple areas of the body.
MS causes nerve damage that affects muscle movements, resulting in spasms. Spasticity happens due to an imbalance in electrical signals from the brain and spinal cord, which makes muscles contract on their own.
Doctors can prescribe medications such as skeletal muscle relaxants, botulinum toxin, alpha2-adrenergic agonists, or benzodiazepines. Physical therapy, surgery, or a combination of treatments can also help ease spasticity.











































