Ok guys I worked this out… some people have ‘I have MS’ next to their user name.
Got to your homepage by clicking on the 'Welcome back (user name) at top right hand of page.
Go to public profile.
Scroll down to ‘what type of MS do you have’.
Under that is a tick box which says something like ‘show this as a badge’.
Untick that box and the ‘I have MS’ should disappear (I hope).
Scroll down to end of page and click ‘Save’.