I ended up getting my diabetes diagnosis after I went to the doctor with a cellulitis infection. I think in my case, this had been present for many months at least, and slowing was slowly getting worse, about which I had been in denial for some time. Particularly if combined with elevated blood pressure and obesity, then blood circulation in the legs may be poor, and hence the body's ability to fight off the infection impaired. It took 4 weeks of high strength antibiotics for my infection to fought off. I decided to totally redesign my lifestyle at that point, and have now lost 4 1/2 stone and cut out all 'bad' foods. I don't think it is that important to find the specific cause of such an infection, but rather to concentrate on general health, and thereby improve the body's ability to fight any infection that does occur.