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It can be hard to tell whether your symptoms might be caused by multiple sclerosis (MS) at first, as some of the symptoms can be quite vague or similar to other conditions.
See a GP if you think you have symptoms of MS.
Letting them know about the type and pattern of symptoms you're experiencing in detail will help them determine whether you might have the condition.
If the GP thinks you could have MS you should see a neurologist, a specialist in conditions of the nervous system, for an assessment.
Diagnosing MS is complicated because no single test can positively diagnose it. Other possible causes of your symptoms may need to be ruled out first.
It may also not be possible to confirm a diagnosis if you have had only 1 attack of MS-like symptoms.
A diagnosis can only be made with confidence once there's evidence of at least 2 separate attacks, although this may include signs of attacks on an MRI scan that you may not realise you have had.
Some of the tests you may need to confirm MS are discussed on this page.
Your neurologist will look for abnormalities, changes or weakness in your vision, eye movements, hand or leg strength, balance and co-ordination, speech and reflexes.
These may show whether your nerves are damaged in a way that might suggest MS.
An MRI scan is a painless scan that uses strong magnetic fields and radio waves to produce detailed images of the inside of the body.
It can show whether there's any damage or scarring of the myelin sheath (the layer surrounding your nerves) in your brain and spinal cord. Finding this can help confirm a diagnosis in most people with MS.
A standard MRI scanner is like a large tube or tunnel. The machine is noisy and some people feel claustrophobic while the scan is done. Tell your neurologist if you're worried about this.
Newer scanners are more open and work quicker than those used in the past, and most people have scans without any problems.
There are several types of evoked potential test. The most common type assesses how well the eyes work.
Light patterns are shown to the eyes while your brainwaves are monitored using small, sticky patches called electrodes placed on your head.
It's a painless test and can show whether it takes your brain longer than normal to receive messages.
A lumbar puncture is a procedure to remove a sample of your spinal fluid by inserting a needle into the lower back.
Spinal fluid is the fluid that surrounds your brain and spinal cord, and changes in the fluid can suggest problems with the nervous system.
The procedure is done under local anaesthetic, which means you'll be awake, but the area the needle goes in will be numbed.
The sample is then tested for immune cells and antibodies, which is a sign that your immune system has been fighting a disease in your brain and spinal cord.
Lumbar punctures are very safe, but are often uncomfortable and can cause a headache that occasionally lasts for up to a few days.
A lumbar puncture will often be performed to provide extra information if your symptoms or scans are unusual.
Blood tests are usually performed to rule out other causes of your symptoms, such as vitamin deficiencies or a very rare, but potentially very similar, condition called neuromyelitis optica.
Once a diagnosis of MS has been made, your neurologist may be able to identify which type of MS you have.
This will largely be based on:
But the type of MS you have often only becomes clear over time because the symptoms of MS are so varied and unpredictable.
It can take a few years to make an accurate diagnosis of progressive MS because the condition usually worsens slowly.
