Normally that is what people do. You can, occasionally, see me elsewhere within HU.
It might, technically, be possible to use multiple names but could be very confusing - for you. Possibly only really viable if you use a different browser for each user name.
I have the same name on two. is it possible to change user name as I fear I may have an internet stalker (or worse attracted a troll) so want to change my user name on HU cheers
This has to be done for you by someone from HealthUnlocked I believe. If you click on the 'Feedback' link on the green bar at top right of this page, you can send them a message to ask about changing user name.
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