Thank you @natsufatsu, @mauveina and @aries324 for your advice. I’ve now sorted things and my colleague has backed off entirely and doesn’t comment or even mention my condition. Admittedly, it was my team leader/supervisor who spoke with her for me but it seems to have worked. I’ll keep in mind what you have all said and try not to be afraid for standing up to misinformed/insensitive people. It’s the first time this has happened to me so it was a bit of a weird situation to find myself in. Plus, I hate conflict and don’t deal with it at all well. Thank you all again for your support and encouraging words!