Hey! We have some information about piercings & tattoos here:
http://www.diabetes.co.uk/tattoos-and-diabetes.html
http://www.diabetes.co.uk/body-piercing ... betes.html
I can give you some anecdotal evidence from someone with stretched ears & piercings that isn't diabetic, but you'll probably want to heed some of the advice from the links above.
Personally, I believe you should take ear stretching as slowly as possible to avoid a 'blow out'. I initially had my ears pierced at 4 years of age and began to stretch them at around 17. I began my stretching journey by getting a metal stretching kit off eBay for about £8 - they say metal is often better as some plastic/metal can be porous and increases the chance of infection, which is obviously something of key importance for someone with diabetes. The first stretch I made was up to 1.6mm - I won't lie, it does hurt. If you feel that a stretcher won't go all the way through, don't force it; that's a sure-fire way to get a blow out. I also wouldn't recommend jumping up a size until you feel the current size is FULLY HEALED (this is crucial) and that you can twist the stretcher around in your ear with little resistance and no pain.
Sorry for the wall of text - I just hate seeing people who stretched their ears wrong and ended up with an infection.
As for piercings, they can be a real pain and a difficult one to get right. Personally, I use Savlon spray in the blue bottle with the pink lid as a daily cleaning solution. If my piercings ever started to get tender, I'd get some sea salt (not table salt, it's far too chemically and harsh) and dissolve it in some boiling water then wait for that to cool to a bearable temperature. Then I'd get some cotton wool balls, dip them in and clean round the piercing with that.
