Thanks everyone. Yes, of course I shall get it checked out - thanks for your encouragement in that regard. Mike - that's a slightly unexpected suggestion re the Prostate - do you know these things are related, or is that just good common sense general advice ? I'm not squeamish about such things - so I'll definitely bear it in mind, thanks. I suppose the essence of my question was - "Is this a known side-effect of Metformin, or perhaps a result of long-term high blood glucose ?". I was diagnosed about 3 months ago, but I don't know how long I've been T2 for. And since then have been on the Metformin plus a low carb diet (trying for Keto, but it's pretty hard going for a foodie like me.....) and my blood sugar seems to me (as a newbie) to be reasonably well controlled - Mr. P - yes, I do "Lance a lot" - for eg. on waking today, 7.7 mmol/L; 2 hours after breakfast - 7.1 (then had a fairly carb-y brunch) and 2 hours after that - 8.7. So I'm surprised that, given these (I think?) relatively normal figures, I'm having weird symptoms like aching knackers and (still) tingly toes ? I'm new to all this - does it just need a bit of time to bed in and calm down ? Thanks once again to all.