Well you’ve only just made me aware of it as a ‘thing’ OP but it’s an interesting idea.
I’m still a little confused though is it meant to be done as a “statement of solidarity” with those suffering from mental health issues (i.e. you need not be a sufferer, but recognise the issues and want to show your support) or is it supposed ot be a subtle little marker for sufferers only? or a bit of both?
Anyway, whatever the reason(s) you might personally choose to do it, that probably needs to align with your chosen location. If it’s in a visible location, you are probably going to have someone strike up a conversation about it, or someone who is familiar with the theme, spot it and perhaps draw some conclusions about you (possibly without any discussion)…
Choose to place it somewhere less visible and it is really just a personal thing, that you don’t want it to be a discussion starter or send messages to others.
Personally I’d shoose somewhere less visible, but given the fact that it can be quite a small tattoo, and I’m a daily watch wearer I’d maybe have it postitioned under a watch strap where I could choose to display or cover it (say at work) and it’s easy enough for me to look at it for myself…
I suppose you could “try it out” easily enough in a couple of locations for a day or two just using a sharpie…