The symptoms of multiple sclerosis:
from the most common to the least known
Complete guide to all the symptoms of MS — visible and invisible, motor and cognitive — to better understand, better communicate, and better support
The multiple sclerosis is often described as "the disease with a thousand faces" — and this nickname is not unfounded. Depending on the location of the demyelinating plaques in the brain and spinal cord, each patient presents a unique combination of symptoms, the intensity of which fluctuates over time. Some symptoms are visible and understood by those around; others are completely invisible but just as debilitating. This comprehensive guide reviews all the symptoms of MS, from the most common to the lesser-known, to help patients, their loved ones, and healthcare professionals better understand the disease in all its complexity.
1. Motor symptoms: what is most easily seen
Motor symptoms are often the first to alert and the most visible from the outside. They result from lesions of the pyramidal pathways (control of voluntary movement) and cerebellar pathways (coordination).
Weakness and paralysis
Muscle weakness (paresis) can affect a limb, one side of the body (hemiparesis), or both lower limbs (paraparesis). It can be permanent or fluctuating depending on the relapses. In progressive forms, it tends to gradually settle in. Complete paralysis (plegia) is possible in severe forms but remains rare.
Frequency: 80-90% of patients at some point in the diseaseWalking and balance disorders
Ataxic gait (unstable, unbalanced, with a widened base of support) or spastic gait (stiff legs, missteps) are characteristic of MS. Balance difficulties increase the risk of falls, especially in dual-task conditions (walking and talking simultaneously) or in the dark. Walking in unfamiliar spaces or on uneven terrain is particularly difficult.
Frequency: 70-85% develop walking difficulties over timeSpasticity
Spasticity manifests as muscle stiffness, involuntary spasms (sudden muscle contractions, often nocturnal and painful), and increased resistance during passive movements. Paradoxically, it can help some patients stand by "stiffening" the lower limbs, but it also hinders walking, care, and sleep quality.
Frequency: 60-80% of MS patientsTremors and coordination disorders
Intentional tremors (which appear when moving towards an object and amplify as one approaches) and cerebellar ataxia (imprecise, broken movements) result from lesions of the cerebellum. They can make eating, writing, or using the phone very difficult, and are often more debilitating than weakness for precise movements.
Frequency: 25-50% of patients2. Sensory symptoms: pain and altered sensations
Sensory disorders are often the first symptoms of MS — this is particularly true for optic neuritis and paresthesias. They result from lesions of the sensory pathways in the spinal cord and brainstem.
Paresthesias and numbness
Tingling, sensations of "pins and needles," numbness, burning sensations or tightness — paresthesias can affect any area of the body. They are often asymmetric and can migrate from one area to another. They are characteristically more intense at night and in warm situations (Uhthoff's phenomenon).
Frequency: inaugural symptom in 20-40% of patientsRetrobulbar optic neuritis
Inflammation of the optic nerve causes unilateral decrease in visual acuity (often perceived as a veil or fog), pain with eye movement, and alteration of color vision (notably red). Optic neuritis is the inaugural symptom of MS in 15-20% of cases. Recovery is usually good in 4-12 weeks, but sequelae persist in 30-40% of cases.
Frequency: 50% of patients at some point in the evolutionNeuropathic pain
Neuropathic pain in MS includes: trigeminal neuralgia (sharp facial pain), girdle pain (sensation of chest tightness called "MS hug"), burning or electric shock pain in the limbs. These pains, often unrecognizable due to the absence of visible lesions, are frequently underdiagnosed and inadequately treated.
Frequency: chronic pain in 50-75% of patientsThe Lhermitte sign
A sensation of electricity or discharge that descends along the spine and radiates into the limbs during neck flexion — this is the Lhermitte sign, highly evocative of MS. It is caused by a lesion of the cervical spinal cord. It can be temporary or persistent, and is often one of the first signs that patients spontaneously report to their doctor.
Frequency: 30-40% of patients3. Fatigue: the most disabling and misunderstood symptom
MS fatigue is not the ordinary fatigue that everyone feels after a long day. It is a fatigue of a completely different nature and intensity — and yet it is one of the most difficult symptoms to make understood by those around and even by some healthcare professionals.
😴 Fatigue MS: what distinguishes it
MS fatigue is disproportionate to effort: it can occur after minimal activity or even without effort. It is not improved by rest: sleeping 10 hours does not change anything. It is aggravated by heat (Uhthoff phenomenon). It massively interferes with daily activities, work, and social life. It can occur suddenly, incapacitating the person in a few minutes. And it is completely invisible — a person with severe MS fatigue may appear "normal" to those around them.
3.1 The two forms of fatigue in MS
⚡ Primary fatigue (neurological)
- Directly related to brain lesions
- Results from overexertion of the damaged nervous system
- Aggravated by heat and effort
- Does not respond to simple rest
- Present from the morning upon waking
- Treated with specific medications (amantadine…)
😴 Secondary fatigue (comorbidities)
- Related to sleep disorders common in MS
- Aggravated by untreated depression
- Consequence of increased effort for motor tasks
- Due to side effects of certain treatments
- Variable depending on the days and activities
- Treated by addressing underlying causes
DYNSEO Motivation Chart
Managing fatigue in MS requires carefully calibrating activities according to the available energy level. The motivation chart helps patients and their caregivers identify activities that provide the most well-being for the least effort — valuable for preserving quality of life despite fatigue.
Access the chartTraining — Fatigue and cognitive disorders in MS
Understanding the mechanisms of MS fatigue, identifying energy management strategies and cognitive compensation tools. An essential training for patients, caregivers, and healthcare professionals.
Access the training →4. Cognitive disorders: the hidden side of MS
Cognitive disorders are one of the most overlooked and inadequately addressed aspects of MS. They affect 50 to 70% of patients at some point in their lives with the disease — and can appear as early as the first stages, sometimes even before motor symptoms.
🧠 Cognitive functions affected in MS
Processing speed
Slowed information processing — the first function affected in MS
Episodic memory
Difficulty memorizing new memories and retrieving them
Sustained attention
Difficulty concentrating for long periods, filtering out distractors
Executive functions
Planning, organization, mental flexibility, decision-making
Working memory
Maintaining and manipulating information in the short term
Verbal fluency
Finding words quickly, accessing the lexicon (word finding difficulties)
The impact on professional and social life is considerable. A patient with MS may appear perfectly "normal" physically and yet may no longer be able to follow a meeting, manage multiple tasks simultaneously, or remember an appointment. These difficulties are often wrongly attributed to a lack of motivation or depression.
Regular cognitive stimulation is recommended in MS as a lever for maintaining intellectual abilities. The application CLINT from DYNSEO is specifically designed for adults with cognitive disorders — its progressive and accessible activities allow for regular training even during days of high fatigue. Online cognitive tests also allow for tracking the evolution of cognitive functions over time and informing the care team.
DYNSEO 3-column board
In the face of planning and organization difficulties related to cognitive disorders in MS, the 3-column board offers a structured visual support to organize tasks, priorities, and important information. Easy to use, even during periods of cognitive fog.
Access the tool5. Psychological and emotional symptoms
Mood disorders in MS are not just understandable reactions to a chronic illness — they are also, to a significant extent, direct neurological manifestations related to lesions in the brain areas regulating emotions.
Depression: the leading cause of suffering in MS
Depression affects about 50% of MS patients during their lifetime — a rate much higher than the general population and even other comparable chronic diseases. It results from direct biological mechanisms (lesions in the limbic circuits) and the psychological reaction to the accumulated losses related to the disease. It must be systematically screened and treated as it exacerbates all other symptoms, particularly fatigue and cognitive disorders.
Anxiety: omnipresent and multifaceted
Anxiety in MS takes several forms: anxiety about the unpredictable progression of the disease, fear of relapses, performance anxiety related to fatigue and cognitive disorders, social phobia related to motor limitations. Uncertainty is probably the most difficult source of anxiety to manage — MS is a disease whose progression is, by nature, unpredictable.
Emotional lability
Uncontrolled laughter or crying, disproportionate to the triggering situation (pseudobulbar affect) — this direct neurological manifestation of brainstem lesions is often very embarrassing for patients. Sometimes confused with depression, it is distinct and responds to specific treatments.
DYNSEO Emotion Thermometer
Putting words to emotions is difficult for many MS patients, especially during periods of emotional fluctuation. The emotion thermometer provides a simple visual support to identify and communicate the emotional state of the day — valuable during medical consultations and in relationships with loved ones.
Access the tool6. Bladder-sphincter and genital disorders
Bladder-sphincter disorders are among the most impactful symptoms on daily quality of life in MS — yet they are often the least spontaneously addressed in consultations, due to modesty or because patients do not connect them with the disease.
Bladder hyperactivity
Frequent urinary urgency, strong need to urinate, urge incontinence — these symptoms deeply disrupt social and professional life and generate significant anticipatory anxiety during travel.
Dysuria and retention
Difficulties starting urination, weak stream, sensation of incomplete emptying, urinary retention — these urinary disorders related to sphincter hyperactivity are less known but common and can promote recurrent urinary infections.
Intestinal disorders
Chronic constipation (very common, related to decreased intestinal motility and sedentary lifestyle) and fecal incontinence (in more advanced forms). These disorders require specific dietary support and sometimes medical treatments.
Sexual disorders
Reduced libido, erectile dysfunction in men, difficulties with orgasm and decreased genital sensitivity in women, dyspareunia — these sexual disorders affect 50-90% of patients and are rarely spontaneously mentioned but can be significantly improved with appropriate care.
Training — MS and daily life: maintaining autonomy and preventing complications
All practical strategies to adapt daily life to MS: managing fatigue, preventing complications, home and workplace adjustments, and preserving autonomy at all stages of the disease.
Access the training →7. The least known symptoms of MS
Beyond the classic symptoms, MS can manifest through lesser-known signs that often surprise patients and their loved ones — and that are sometimes poorly recognized even by some health professionals.
| Unknown symptom | Description | Estimated frequency | Often confused with... |
|---|---|---|---|
| Swallowing disorders | Difficulties swallowing, coughing during meals, aspiration | 30-40 % | ENT or gastric problem |
| Speech disorders (dysarthria) | Slurred, monotone voice, difficult to understand | 25-40 % | Alcoholism, Stroke |
| Itching and skin sensations | Intense itching without visible skin lesions | 15-30 % | Allergy, dermatosis |
| Musculoskeletal pain | Joint and muscle pain related to spasticity or immobility | 50-70 % | Arthritis, fibromyalgia |
| Diplopia (double vision) | Double or shaky vision related to oculomotor impairment | 30-40 % | Isolated ophthalmological problem |
| Dizziness | Sensation of spinning, instability, sometimes vomiting | 20-30 % | Labyrinthitis, Ménière's disease |
| Apathy | Loss of motivation and initiative, distinct from depression | 40-50 % | Depression, laziness |
The Uhthoff phenomenon — when heat worsens everything: An increase in body temperature (hot bath, fever, intense exercise, high summer heat) causes a temporary worsening of all existing symptoms. This is not a relapse — symptoms regress with cooling — but it is often misunderstood and can discourage patients from engaging in physical activity. The solution: stay well hydrated, avoid prolonged exposure to heat, use cooling vests or towels, engage in physical activity in a pool or in a cool environment.
8. Visible symptoms vs invisible symptoms: the challenge of understanding by those around
One of the most painful challenges for MS patients is the gap between their outward appearance and their inner reality. A person who walks normally may suffer from debilitating fatigue, intense neuropathic pain, significant cognitive disorders, and severe anxiety — without any of this being visible from the outside.
“I come across as someone normal. People don't understand why I have to cancel plans at the last minute, why I am exhausted after an activity that seems simple, why I lose track of a conversation. Invisible MS is sometimes harder to live with than visible MS — because you are alone with your symptoms.”
— Testimony from an MS patient, perspective gathered in support groupsThis reality has significant implications for relatives and healthcare professionals. Not seeing a symptom does not mean it does not exist. Trusting the patient's word about their invisible symptoms, without seeking "visible" evidence, is a fundamental stance for respectful and effective support.
DYNSEO session tracking sheet
The session tracking sheet allows for recording observed symptoms and activities carried out during care or rehabilitation sessions. It facilitates communication between healthcare professionals and serves as a valuable tool for documenting the evolution of symptoms over time.
Download the sheet9. How symptoms evolve according to the form of MS
| Type of MS | Characteristic Symptoms | Evolution | Priority Care |
|---|---|---|---|
| Relapsing-Remitting MS (RRMS) | Symptoms in episodes with partial recovery | Variable, usual recovery between episodes | Background treatment to prevent episodes |
| Secondary Progressive MS | Continuous progression, accumulation of disability | Slow worsening evolution | Slow down progression, intensive rehabilitation |
| Primary Progressive MS | Progression from the start, often para-/hemiplegia | Progressive evolution without distinct episodes | Ocrelizumab, intensive physiotherapy, prevention of complications |
| Clinically Isolated Syndrome | First isolated episode (optic neuritis, sensory symptoms) | May evolve or remain isolated | MRI monitoring, early therapeutic decision |
Training — Understanding MS: essential guide for relatives
An accessible training that explains the mechanisms of the disease, its evolving forms, and its symptoms in a clear and compassionate way — so that relatives can better understand what the person with MS is experiencing and better support them in daily life.
Access the training →10. Supporting Symptoms in Daily Life: Resources and Tools
In the face of the diversity and unpredictability of MS symptoms, daily support requires concrete tools, adapted to the different challenges that each day may bring. DYNSEO has developed a set of resources specifically tailored for MS patients and their relatives.
- Regular cognitive stimulation with the CLINT application — to maintain cognitive functions and compensate for the slowing of information processing
- Cognitive function assessment with the online cognitive tests — to track evolution over time and inform the medical team
- Emotion management with the emotion thermometer — to identify and communicate emotional state
- Task structuring with the 3-column board — to compensate for organizational and planning difficulties
- Motivation and engagement with the motivation board — to maintain regular cognitive and physical activity despite fatigue
- Monitoring care sessions with the session monitoring sheet — to ensure continuity among different caregivers
Training — Living with MS in the long term: caregiver, couple, and future
How to maintain a balanced life for the caregiver and the couple in the face of evolving MS symptoms over time. Prevent burnout, communicate about invisible difficulties, and build a common life project despite the disease.
Access the training →Training — MS in institutions: understanding and adapting professional practice
For caregivers who support MS patients in institutions: understanding the specifics of each symptom, adapting care to motor and cognitive fluctuations, and maintaining patient autonomy for as long as possible.
Access the training →Better understanding the symptoms to live better with MS
MS is a disease with a thousand faces — but each symptom, visible or invisible, deserves to be recognized, named, and addressed. Better understanding the disease means better communicating with caregivers, better helping those around us understand what we are experiencing, and better finding the coping strategies that allow us to continue living fully despite the disease.
Explore DYNSEO's MS training →FAQ — Symptoms of MS: Frequently Asked Questions
Q1 Are the symptoms of MS the same in all patients?
No — this is precisely what makes MS so complex to understand and diagnose. The symptoms depend on the location of the demyelination plaques in the brain and spinal cord. Two people with MS can have very different clinical presentations: one may primarily exhibit motor disorders, while the other may primarily show sensory and cognitive disorders. This interindividual variability is one of the fundamental characteristics of the disease.
Q2 Can MS fatigue be treated?
Yes, several approaches can help reduce MS fatigue, although no treatment is completely effective. In terms of medication: amantadine, modafinil, and certain antidepressants can help. In non-medical terms: energy management (energy-saving techniques), regular adapted physical activity, correction of sleep disorders, treatment of underlying depression, and combating sedentariness are the pillars of effective management. Always report fatigue to your neurologist — it should not be accepted as a fatality.
Q3 How to distinguish a true relapse from a pseudo-relapse in MS?
A true relapse involves the appearance of new neurological symptoms or a clear worsening of existing symptoms, lasting more than 24 hours, in the absence of fever or infection, separated by at least 30 days from the previous relapse. A pseudo-relapse (or Uhthoff phenomenon) is a temporary worsening of already present symptoms, triggered by heat, an infection, or fatigue, which completely regresses with cooling or recovery. The distinction is important because only true relapses justify treatment with corticosteroids.
Q4 Can cognitive disorders in MS improve?
In relapsing forms, cognitive disorders can partially improve after a relapse thanks to brain plasticity. In the long term, regular cognitive stimulation, treatment of depression and fatigue, physical activity, and control of cardiovascular risk factors contribute to maintaining cognitive abilities. The JOE application from DYNSEO is an accessible cognitive stimulation tool suitable for MS patients. Specific medications for cognitive disorders in MS are undergoing clinical evaluation in 2026.
Q5 What DYNSEO training courses are recommended to better understand the symptoms of MS?
DYNSEO offers five training courses dedicated to MS: Essential Guide for Caregivers, Fatigue and Cognitive Disorders in MS, MS and Daily Life, Living with MS Long-Term, and MS in Institutions. All are Qualiopi certified, accessible via e-learning, and can be funded through OPCO or CPF.
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