Thousands of people across the UK are living with multiple sclerosis (MS) - a lifelong condition affecting the brain and nerves.
With MS, inflammation can occur in parts of the brain or spinal cord which causes symptoms. Affected nerve fibres can become vulnerable to damage, and over time may be lost entirely.
When this happens, messages can no longer get through and symptoms become permanent. This gradual, steady accumulation of disability is called MS progression, reports The Mirror.
