Multiple Sclerosis: Symptoms, Causes & Treatment

Multiple sclerosis (MS) is a chronic autoimmune neurological disease in which the immune system attacks myelin—the protective covering of nerve fibers in the brain, spinal cord, and optic nerve. This attack causes inflammation and scarring in these areas, disrupting communication between the brain and the rest of the body.

The disease has several patterns: relapsing-remitting MS (85% of cases at diagnosis) features sudden attacks followed by periods of remission, while primary progressive MS shows continuous decline from onset. Symptoms typically appear between ages 20-40, with women affected 2-3 times more often than men. Approximately 2.8 million people worldwide have MS, with increasing diagnosis rates in the Middle East region, including Jordan, though prevalence remains lower than in Western countries.

Although multiple sclerosis is chronic without a cure, modern medications and biological therapies (such as Ocrelizumab) have revolutionized disease management. These treatments slow disease progression, reduce relapse frequency significantly, and improve long-term quality of life and outcomes for patients.

Multiple sclerosis symptoms are highly variable and depend on the location of inflammation in the nervous system. Symptoms can be mild or severe, and may appear and disappear in relapses. Women and men may experience different symptom patterns; for example, women often report more fatigue and cognitive problems, while men may experience greater motor impairment and weakness.

• Weakness and fatigue: Severe exhaustion and general weakness, especially in the limbs.
• Vision problems: Blurred vision, double vision, or vision loss in one eye (optic neuritis).
• Numbness and tingling: Paresthesia in the extremities or face.
• Balance and dizziness disorders: Persistent vertigo, balance problems, and instability.
• Pain and burning: Burning pain or stabbing sensations throughout the body.
• Bladder and bowel problems: Urgency and frequency of urination, urinary retention, or constipation.
• Sexual dysfunction: Erectile dysfunction or decreased sexual desire.
• Temperature sensitivity: Inability to regulate body temperature properly.
• Cognitive and memory issues: Difficulty concentrating, short-term memory loss, or slowed information processing.
• Depression and anxiety: Mood swings and feelings of depression or anxiety.
• Headaches and neuralgias: Recurrent headaches and sharp nerve pain.
• Speech and swallowing difficulties: Difficulty speaking clearly or swallowing food and liquids.

• Autoimmune dysfunction: The immune system fails to distinguish between body tissues and foreign invaders, mistakenly attacking myelin.
• Genetic factors: Specific genes (such as HLA-DRB1) increase susceptibility, especially with family history of MS.
• Previous viral infections: Exposure to certain viruses, particularly Epstein-Barr virus (EBV), may trigger immune attacks on nerve tissue.
• Environmental factors: Exposure to certain chemicals or smoking may increase disease development in genetically predisposed individuals.
• Vitamin D deficiency: Low levels of vitamin D are associated with increased MS risk.
• Hormonal and sex-related factors: Hormonal changes affect disease activity; some women experience improvement during pregnancy.
• Psychological stress: Severe stress may trigger relapses or worsen symptoms.
• Smoking: Smokers have higher MS risk and faster disease progression.

• Female sex: Women are 2-3 times more likely to develop MS than men.
• Age: Risk peaks between ages 20-40, though MS can occur at any age.
• Family history: Having a first-degree relative with MS increases risk by 2-5%.
• Geographic location: Regions farther from the equator (Europe, North America) have higher incidence rates.
• Obesity and excess weight: Particularly obesity during adolescence and early adulthood.
• Current or past smoking: Smoking approximately doubles the risk of MS.
• Vitamin D deficiency: Low vitamin D levels are associated with increased risk.
• Epstein-Barr virus (EBV) infection: Prior EBV infection significantly increases MS risk.
• Other autoimmune diseases: Having other autoimmune conditions may elevate risk.
• Chronic psychological stress: Prolonged exposure to high stress levels.

Multiple sclerosis diagnosis requires a combination of clinical, laboratory, and imaging tests, as no single test definitively confirms MS. Diagnosis is based on internationally recognized criteria (McDonald Criteria) that assess evidence of inflammatory activity distributed in space and time.

• Neurological examination: The neurologist assesses muscle strength, reflexes, balance, vision, and sensation, looking for signs such as asymmetric weakness or delayed nerve responses.
• Magnetic Resonance Imaging (MRI): The most important imaging test, revealing lesions (scars) in the brain and spinal cord. Contrast-enhanced MRI identifies recently active lesions. Multiple lesions in different locations support diagnosis.
• Cerebrospinal Fluid (CSF) Analysis via Lumbar Puncture: Examination of fluid surrounding the brain and spinal cord for inflammatory markers such as oligoclonal bands or elevated IgG (present in ~95% of MS cases). These findings strengthen the diagnosis.
• Visual Evoked Potentials (VEP): Measures the optic nerve's response speed to visual stimuli. Delayed responses indicate prior optic nerve inflammation, supporting evidence of dissemination in time.
• Brainstem Auditory Evoked Responses (BAER): May be used to assess brainstem and auditory nerve function.
• Blood tests: Include antibody testing (anti-MOG, anti-AQP4) to exclude similar conditions, and screening for viral antibodies (especially EBV) to assess risk factors.
• Revised McDonald Criteria (2017): Based on lesions in different CNS locations (spatial dissemination) and at different times (temporal dissemination), established through multiple clinical episodes or combining clinical and imaging data.

Medications

• Disease-Modifying Therapies (DMTs): The cornerstone of MS treatment, recommended for all patients. Include:
  • Modern Biological Therapies (Monoclonal Antibodies): Such as Ocrelizumab (targets B cells), Natalizumab (prevents immune cell migration), and Alemtuzumab (targets lymphocytes). These are highly effective at reducing relapse rates and disease progression.
  • Oral therapies: Such as Fingolimod and Teriflunomide, convenient and relatively safe.
  • Earlier treatments: Such as Interferon beta and glatiramer, still effective but less potent than modern agents.
• Corticosteroids: Used during acute relapses to reduce rapid inflammation, typically administered intravenously (methylprednisolone) at high doses.
• Symptomatic medications: To manage specific symptoms including muscle relaxants (Baclofen, Tizanidine) for spasticity, pain medications for neuropathic pain, antidepressants and anti-anxiety agents, and bladder/bowel control medications.

Procedures and Other Treatments

• Physical Therapy: Maintains muscle strength, flexibility, and balance. Continuous therapy is recommended.
• Occupational Therapy: Helps adapt to daily activities and improves independence.
• Speech and Language Therapy: For patients with speech and swallowing difficulties.
• Psychological counseling: Addresses depression and anxiety resulting from the disease.
• Neurorehabilitation: Specialized programs to recover lost neurological function.
• Plasma Exchange: May be used in severe acute cases unresponsive to corticosteroids.

Lifestyle Modifications

• Regular exercise: Light to moderate activities such as walking, swimming, and yoga improve strength, balance, and mental health. Avoid intense exertion and excessive heat.
• Adequate sleep: Regular, quality sleep reduces symptoms and fatigue. Aim for 7-9 hours daily.
• Healthy diet: Rich in vitamins and minerals, especially vitamin D and omega-3 fatty acids. Mediterranean diet may help improve symptoms.
• Stress management: Relaxation techniques and meditation reduce relapses and symptoms.
• Avoid smoking and alcohol: Smoking worsens disease progression; alcohol may interact with medications.
• Maintain moderate body temperature: Avoid extreme heat and cold, as they can worsen symptoms.
• Regular follow-up with physician: Periodic check-ups (every 3-6 months) to monitor disease progression and adjust treatment as needed.
• Social and psychological support: Joining MS support groups and connecting with other patients reduces feelings of isolation.
• Multidisciplinary team approach: Collaboration with a neurologist, physical therapist, and psychologist improves outcomes.

• Paralysis and motor disability: Advanced cases may lead to complete loss of mobility, wheelchair dependence, or complete lower limb paralysis.
• Blindness or partial vision loss: Repeated optic neuritis may result in permanent blindness or reduced vision.
• Severe cognitive impairment: Early dementia, severe memory loss, and concentration difficulties affecting quality of life and work capacity.
• Depression and psychiatric disorders: Severe depression, anxiety, and suicidal ideation may result from physical disability.
• Recurrent urinary tract and kidney infections: Bladder dysfunction and incomplete emptying may lead to kidney failure in severe cases.
• Falls and fractures: Balance problems and weakness increase fall risk and fractures, especially with concurrent osteoporosis.
• Blood clots (Deep Vein Thrombosis): Result from limited mobility and prolonged immobility, particularly in the lower extremities.
• Respiratory problems: If inflammation affects the brainstem and respiratory muscles, mechanical ventilation may be required.

• Avoid smoking: Not smoking or quitting is crucial for preventing MS and slowing its progression if present.
• Maintain adequate vitamin D levels: Regular sun exposure (10-30 minutes daily) and consuming vitamin D-rich foods or supplements, especially in areas far from the equator.
• Eat a healthy, balanced diet: Rich in vitamins, minerals, and fiber; low in saturated fats may reduce risk.
• Exercise regularly: Regular physical activity strengthens healthy immune function and improves overall health.
• Manage psychological stress: Use relaxation techniques, meditation, and mindfulness to reduce stress.
• Maintain healthy weight: Obesity, especially in adolescence and young adulthood, increases MS risk. Keep BMI between 18-25.
• Avoid excessive viral infections: Practice good hygiene, and get vaccinated against preventable diseases.
• Regular health check-ups: If there is family history of MS, genetic counseling and periodic screening may be beneficial.
• Avoid harmful chemical exposure: Minimize exposure to chemicals in workplace or home, as some may increase risk.
• Sleep well and regularly: Quality sleep supports healthy immune function and reduces disease risk.