Multiple sclerosis
Multiple sclerosis is a chronic disease in which the immune system damages the protective sheath of nerve fibres in the brain and spinal cord. It runs in relapses and quiet periods, a neurologist confirms it from magnetic resonance imaging and a spinal fluid examination, and treatment starts as soon as the diagnosis allows.
SourceNICE
In short
- Who diagnoses it
- A neurologist, in a specialised centre.
- What decides it
- Magnetic resonance imaging of the brain and spinal cord, with a spinal fluid examination.
- How it is treated
- A short course for a relapse, and a long-term medicine that reduces how often relapses come.
- What matters most
- Starting the long-term treatment early, and keeping the review appointments.
What is happening in the body?
The immune system attacks myelin, the sheath that lets a nerve carry a signal quickly. Where the sheath is damaged the signal slows down or stops, and what you notice depends on which nerve it was: vision in one eye, balance, strength in a leg, numbness in the hands.
The damage happens in episodes. A relapse builds over days, lasts weeks, and then partly or fully recedes. Between relapses the disease can still be active without being felt, which is why the imaging matters as much as the symptoms.
How is it diagnosed?
A neurologist puts three things together: what you describe, magnetic resonance imaging of the brain and spinal cord, and an examination of the spinal fluid. The imaging shows where the damage is and whether it happened at different times; the fluid shows whether the immune system is active inside the nervous system.
There is no single test that says yes or no. The diagnosis is made when the picture as a whole fits and other explanations have been ruled out, which is why the first appointment is rarely the last one.
What does treatment look like?
Treatment has two jobs: settle a relapse when it comes, and reduce how often relapses happen at all. The first is usually a short course of corticosteroids. The second is a long-term medicine chosen according to how active the disease is, and it works best when it starts early.
Alongside the medicine, rehabilitation keeps strength and balance, and regular imaging shows whether the treatment is holding. Most of this happens in a specialised centre rather than at a general practice.
What will the first year look like?
Expect the first months to be busy: the examinations that confirm the diagnosis, the decision about long-term treatment, and the appointments that check how you tolerate it. After that the rhythm settles into planned reviews rather than reacting to episodes.
What to watch once you are on treatment
After the first year the rhythm settles into planned reviews. Imaging checks whether the treatment is holding even when you feel nothing, and the neurologist scores disability on the EDSS scale and compares it with the last visit.
Treatment changes when a relapse comes, when imaging shows new lesions, or when you do not tolerate the medicine. Plan a pregnancy with your neurologist in advance: some medicines have to be stopped well before.