Sara was 22 when she was diagnosed with relapsing remitting multiple sclerosis (MS).
"It all started when Iwas in my final year of university. I was travelling home from a job interview when somebody stole my purse. It was very upsetting.
"Then I woke thenext day and couldnt see properly. My vision was blurry in my left eye, and I couldnt see colours clearly. I also had pain behind my eye. I went to the doctor, thinking it would be something like conjunctivitis, but my GP was so concerned that she sent me to hospital that night.
"After a series of tests I was diagnosed with optic neuritis, which is theswelling of the optic nerve. I didnt realise it at the time, but this is sometimes one of the first signs of MS.
"I then saw a neurologist and had a magnetic resonance imaging (MRI) scan and some really uncomfortable eye tests. I was diagnosed with relapsing remitting MS and felt very scared.
"By this time, it was six months after my initial eye problems and I was struggling to walk. I was weak, shaky and felt a lot of tingling in my body. My parents noticed I was dragging my left leg. But I think these symptoms were linked to stress it was just after September 11th, and I remember feeling absolutely devastated.
"I was very fortunate. My neurologist thought I was verywell-suited for beta interferon injections. Beta interferon is a disease-modifying medicine that reduces the number and severity of MS relapses.
"Three months later, I was approved for this treatment and started my weekly injections. The side effects were absolutely dreadful. I had flu-like symptoms, which began 24 to 48 hours after the injection.
"Im still on the injections now, aged 30. Fortunately the side effects have now become less severe, although I do still suffer from them. Because the disease and treatment side effects can make you feel lousy, Im prone to depression, so Ialso take antidepressants.
"But by looking at me, youd never know I have the illness. I work full-time for the NHS, and am doing a Masters degree. I find that it really helps to keep a positive mental attitude.
"I still suffer from fatigue and eye problems, and I now wear glasses. Some days, when my leg isnt working well, I just take it easy. My work colleagues have been very supportive.
"When I go for my hospital check-ups twice a year, I see people in wheelchairs who areclearly in a much worse condition than I am. I consider myself very lucky."
Multiple sclerosis (MS) is a condition which can affect the brain and/or spinal cord, causing a wide range of potential symptoms, including problems with vision, arm or leg movement, sensation or balance.
Read about the main symptoms of multiple sclerosis (MS), including fatigue, unusual sensations, difficulties with movement and vision problems.
Exactly why someone develops multiple sclerosis (MS) isn't known. It's not caused by anything you've done and it's not clear whether it can be prevented.
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.
There's currently no cure for multiple sclerosis (MS), but it's possible to treat the symptoms with medications and other treatments.
You may have to adapt your daily life if you're diagnosed with multiple sclerosis (MS), but with the right care and support many people can lead long, active and healthy lives.
Jo was diagnosed with multiple sclerosis after the birth of her son. She explains how it affects her body, her ability to move around and her family life.
Narinder Kaur-Logue has an aggressive form of relapsing remitting multiple sclerosis. She experiences debilitating fatigue on a daily basis and has regular relapses.
Leonie Martin, age 45, has relapsing-remitting multiple sclerosis.She explains how she learnt to manage her symptoms.