hi steve, you can damage your tissues by constant BGs testing and this will also cause false readings due to the inflammation in the areas and will thicken the tissues, i have seen it in many patients.I tend to use the same lancet for about 10 readings but then I have been bought up to be careful with things ,i wash my hands in a nice warm basin of soapy water. and use the most lightest jab on the sides of my ring or little finger, so that I don't interfere with the sensitivity and nerve ends of my finger, taking the smallest amount of blood possible, I don't worry if its not the right thing to do anymore because I know I am being carefull with what I eat now, its amazing how quickly things heal when BGs are within normal limits again.
However, I do have days when I do really stupid things and fall of the waggon and find it difficult to be so bloody good, and patient i could scream.lol