Multiple Sclerosis
Also known as MS
This article is general health information for the selected condition. It is not a diagnosis and does not replace clinical judgement. If you have questions or need treatment advice, please consult a qualified healthcare professional.
What is multiple sclerosis?
Multiple sclerosis is a condition in which the immune system attacks myelin, the insulating sheath around nerve fibres in the brain and spinal cord. This disrupts signal transmission and produces varied neurological symptoms separated in time and location. Modern disease modifying therapies substantially reduce relapses and disability accumulation when started early.
Causes
- Autoimmune attack on central nervous system myelin
- Genetic susceptibility including HLA DRB1
- Epstein Barr virus infection as a strong associated factor
- Low vitamin D and reduced sun exposure
- Smoking
Symptoms
- Fatigue that is often disproportionate
- Numbness or tingling in limbs or face
- Visual loss or pain in one eye from optic neuritis
- Double vision
- Weakness and difficulty walking
- Balance and coordination problems
- Bladder urgency and frequency
- Cognitive slowing
Risk factors
- Age of onset typically 20 to 40
- Female sex
- Living further from the equator
- Family history of multiple sclerosis
- Smoking
- Childhood obesity
Diagnosis
- MRI of brain and spinal cord showing characteristic lesions
- Demonstration of lesions separated in space and time
- Cerebrospinal fluid analysis for oligoclonal bands
- Visual evoked potentials
- Blood tests to exclude mimics such as B12 deficiency and lupus
Treatment
- Disease modifying therapies to reduce relapse rate
- High dose corticosteroids for acute relapses
- Physiotherapy and occupational therapy
- Fatigue management strategies
- Bladder management and continence support
- Spasticity treatment with baclofen or similar
- Vitamin D supplementation and smoking cessation
Self care
- Take disease modifying therapy consistently
- Stay physically active within your limits
- Manage heat sensitivity with cooling strategies
- Pace activity to manage fatigue rather than pushing through
- Maintain vitamin D levels
- Stop smoking, which accelerates progression
- Plan bladder management proactively
When to see a doctor
Book an appointment if:
- New neurological symptoms lasting more than 24 hours
- Worsening walking, balance or coordination
- New bladder or bowel problems
- Increasing fatigue or cognitive difficulty
- Low mood
- Before pregnancy, since some therapies must be stopped
Some symptoms need emergency care rather than an appointment. See the warning signs listed above.
Prevention
- MS cannot currently be prevented
- Relapses are reduced by consistent disease modifying therapy
- Do not smoke
- Maintain adequate vitamin D
- Treat infections promptly, since they can trigger relapses
- Keep cardiovascular risk factors controlled
Outlook
Outlook varies widely and has improved substantially with modern therapies. Many people with relapsing remitting MS remain fully mobile and in work for decades, particularly when treatment starts early. A proportion transition to progressive disease over time. Disability accumulation is now considerably slower than historical figures suggest.
Common questions
Does multiple sclerosis always cause severe disability?
No. Outcomes vary widely and have improved substantially with modern therapies. Many people remain fully mobile and in work for decades, particularly when treatment starts early.
Why does heat make symptoms worse?
Raised body temperature slows conduction along demyelinated nerves, temporarily worsening symptoms. This is called the Uhthoff phenomenon and resolves on cooling; it does not represent new damage.
What causes MS fatigue?
It reflects the extra effort the nervous system needs to conduct signals, and is not simply tiredness or low motivation. Pacing, exercise, sleep treatment and sometimes medication all help.
References
Important: Dard AI is not a medical device and does not diagnose, treat, or replace clinician judgement. This article is general information only. Always consult a qualified healthcare professional about diagnosis and treatment, and seek emergency care for severe or rapidly worsening symptoms.