Neurology

Multiple Sclerosis: Living with an Autoimmune Brain Disease

2.8 million people affected worldwide

Dr. Caroline Delmas

Neurologist

11 min read
Medical illustration of Multiple Sclerosis: Living with an Autoimmune Brain Disease

In simple terms

Vision problems, numbness, fatigue: multiple sclerosis often strikes between 20 and 40 years old. Current treatments can slow its progression.

What is MS?

Multiple sclerosis (MS) is an autoimmune disease of the central nervous system in which the immune system attacks the myelin sheath that surrounds and protects nerve fibers. These lesions (plaques) disrupt the transmission of nerve impulses between the brain, spinal cord, and the rest of the body.

Varied symptoms

MS can affect almost all neurological functions: visual disturbances (optic neuritis), numbness, tingling, muscle weakness, balance problems, intense fatigue, urinary problems, pain, and cognitive disorders. Symptoms vary widely from patient to patient.

Disease forms

The relapsing-remitting form (85% of onsets) progresses with relapses interspersed with remissions. The secondary progressive form follows the relapsing form with a gradually accumulating disability. The primary progressive form (10-15%) worsens from the beginning without distinct relapses.

Current treatments

Disease-modifying treatments (interferon beta, glatiramer acetate, fingolimod, ocrelizumab, natalizumab) reduce the frequency of relapses and slow the accumulation of disability. Ocrelizumab is the first effective treatment for the progressive form. Rehabilitation, physical activity, and psychological support are essential components of management.

The words explained

Medical terms used above, in everyday language.

Symptom
A sign you can feel or see that something is wrong, like pain, tiredness or a rash.
Immune system
Your body's defence team: cells that fight germs and repair damage.
Cognitive
Related to thinking: memory, attention, learning and decision-making.
Remission
A period when the disease is quiet and symptoms fade or disappear.
Relapse / flare-up
A moment when symptoms come back or get worse again.

When should you see a doctor?

  • Your symptoms last more than a few weeks or keep coming back.
  • They get worse quickly, or stop you doing everyday things.
  • You notice sudden pain, breathing trouble, fainting or bleeding — seek urgent care.
  • You already take medication and want to change anything about it.

This article explains general health information. It does not replace advice from your own doctor.

Frequently asked questions

What is Multiple Sclerosis: Living with an Autoimmune Brain Disease?
Vision problems, numbness, fatigue: multiple sclerosis often strikes between 20 and 40 years old. Current treatments can slow its progression.
What are the main symptoms or signs of Multiple Sclerosis: Living with an Autoimmune Brain Disease?
Common signs vary from person to person. The article above lists the symptoms to watch for, how they progress, and when they need medical attention.
When should you see a doctor for Multiple Sclerosis: Living with an Autoimmune Brain Disease?
See a doctor if symptoms last more than a few weeks, get worse quickly, stop you doing everyday things, or if you notice sudden pain, breathing trouble, fainting or bleeding.