It's a condition which many simply shorten to MS, but for Julia, MS stands for something else.
“Mighty strong,'' is her own version of the acronym and it's an attitude she leads her life by.
Twelve years on from the diagnosis, Julia strives to live a life fueled by positivity and a can-do attitude to ensure she gets through the tough times.
You can't let life get the better of you, you have to challenge yourself.
And that’s why she chose Outward Bound - an adventure, which many thought she was "nuts" for taking on.
Now aged 32, Julia had attended Outward Bound during her school days, but when she returned for a second time there was an obvious difference.
Julia took part in the 8 day Activate course which is an adapted course for students with physical disabilities.
The determined Southlander admitted she cried quite a bit during the week which was shared with eight other students who had their own differing battles.
The tears flowed when Ms Colhoun felt frustrated and ready to give in. But tears of joy also flowed when she completed an activity.